3D wooden combination safe puzzle, mechanical model - BASTION
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Laser-cut wood Combination mechanism A safe that doesn't just keep your secrets: it creates them with you. This 3D wooden puzzle replicates a combination safe in a cubic shape, 12 × 12 × 12 cm once assembled, with its front door, three numbered dials, and a large central gear dial. Each piece is made from laser-cut light plywood, then assembled by interlocking, with no visible glue in the photos of the finished model. The result is both a mechanical model and a desk accessory: as you build it, you understand how the code releases the lock and how the central dial, through a pinion and rack, causes the door to release. Designed for adults and teenagers aged 14 and up, BASTION is for minds that love to know what happens behind a closed door. Once finished, it finds its place on a shelf or desk, ready to hold a small personal treasure: a key, a spare wedding ring, a folded note, a USB drive. A patient construction for a secret object to be handled every day.
The model and its finish
The combination lock, explained through wood
The principle of a disc lock dates back to Renaissance letter padlocks, and later to 19th-century bank safes. Each dial turns a disc with a notch; as long as the notches are not all aligned with the bolt, the bolt catches and the door remains locked. It takes only one wrong digit for the lock to hold. With three dials of ten positions, you get one thousand possible combinations: enough to discourage a visitor's curiosity, not enough for a real bank vault, and that is just right for a desk object. On BASTION, opening occurs in two steps: first, enter the code on the three dials, then turn the large central dial, whose gear acts on the pinion and rack of the lock, visible on the back of the door.
Laser-cut plywood is particularly well-suited for this demonstration. The beam burns the wood with a precision of a tenth of a millimeter, allowing for tenons and mortises that fit tightly, and gears or cams whose teeth mesh without excessive play. The edges, slightly caramelized by the cutting process and darker than the face, highlight each piece and give the assembled model its characteristic brown-and-honey contrast. The numbers and patterns are surface-engraved using the same process.
Why BASTION deserves a place on your desk
A door, three numbers, and some patience
There is a very special moment in the construction of BASTION: when the door, finally set on its wooden hinges, refuses to open. The dials turn, the numbers scroll, and nothing gives. Then the correct combination aligns, you turn the large central dial, the rack retracts, and the door pivots open. It is at this moment that you realize you have not just assembled boards, but brought a mechanism to life.
The safe is an object of fiction as much as a real object: it evokes gentleman burglar novels, colonnaded banks, and notary offices. BASTION keeps the essence, the cubic mass and the disciplined facade, but translates it into a warm material. Light wood replaces steel, engraving replaces paint, and the object becomes a piece you want to keep near you rather than in a cupboard.
Building BASTION in four steps
BASTION compared to other chests in the series
| Criteria | BASTION Safe | Code Trunk (same series) | Secret Chest (same series) |
|---|---|---|---|
| Silhouette | Cube with front door | Trunk with top handle, slatted lid | Chest on curved feet, sculpted facade |
| Opening | Code, then central dial: door pivots on the front | Lid that lifts up | Lid that hinges up, side-pivoting compartments, and front drawer |
| Code | Three numbered dials on front | Three code dials on front | No numbered code; one dial on the side |
| Spirit | Bank, notary safe, rigor | Travel trunk with engraved Christmas decor | Treasure, cabinet of curiosities |
| For whom | Lover of mechanisms and logic | Dreamer of grand departures | Lover of decor and mystery |
| Dimensions | 12 × 12 × 12 cm | 10.6 × 8.5 × 7.7 cm | 15.4 × 11 × 8.7 cm |
If you are hesitating between several models, our entire collection of puzzles and desk objects brings together models to handle and display.
Good to know: manufacturer photos indicate a 12 × 12 × 12 cm cube once assembled. However, the number of pieces and assembly time are not specified, and we prefer not to provide approximate figures. An illustrated guide accompanies the assembly, and the CE marking as well as the recommended age of 14 and up are indicated by the manufacturer.
Tip: for a smoother mechanism, lightly rub the axes and contact areas of the dials with a pencil or a piece of candle wax: the graphite and wax reduce wood-on-wood friction without staining it. Avoid oil, which makes the fibers swell.
Technical specifications
| Model | BASTION combination safe |
| Type | 3D puzzle / mechanical model kit |
| Material | Light plywood |
| Production | Laser cutting and engraving |
| Assembly | Interlocking, per illustrated guide (no visible glue) |
| Opening | Code on three numbered dials, then large central gear dial |
| Lock | Pinion and rack on the back of the door |
| Interior | Empty storage compartment |
| Finish | Natural unfinished wood |
| Recommended age | 14+ (manufacturer specification) |
| Compliance | CE mark (manufacturer specification) |
| Dimensions (assembled) | 12 × 12 × 12 cm |
| Number of pieces | Not disclosed |
| Assembly time | Not disclosed |
Precautions: this kit contains small parts that could be swallowed: not suitable for children under 3 and is intended, according to the manufacturer, for persons 14 years and older. Wood is a combustible material: keep away from fire, candles, and heat sources.
Never force a dial or the door: a thin wooden piece can crack. This safe is a decorative and playful object; it does not protect valuables against theft.
A gift that earns its keep
BASTION is an ideal present for a birthday, Father's Day, retirement, or Christmas for fans of mechanics. You can even give it assembled, with a little note tucked behind the door and the code passed on separately: the gift then begins with a puzzle.
To complete the surprise, explore the scientific objects of the Labo, where you can find other pieces to understand before admiring, or our decoration ideas to find it a shelf of its own.
Frequently asked questions
Does the BASTION safe really open with a code?
Yes, that is the whole point of this model. The facade features three numbered dials connected to a code mechanism, and the front door remains locked as long as the correct combination is not displayed. The opening follows a precise sequence: first, enter the code on the three dials, then turn the large central gear dial, whose pinion drives the lock's rack attached to the back of the door; the door then opens. However, the supplier does not specify whether the combination is modifiable after assembly or fixed by the construction; we therefore prefer not to make any promises on this point. In any case, note your code at the time of assembly before closing the cube.
Is glue required for assembly?
The parts are designed for interlocking assembly: tenons, notches, and tabs insert into one another. In photos of the assembled safe, you see no traces of glue, which is consistent with this type of laser-cut plywood model. We strongly advise you not to add any on the moving parts: a misplaced drop would be enough to jam a dial or the door. If a fixed joint seems too loose after assembly, a touch of wood glue on a wall might be considered, but the mechanism must remain perfectly free.
How long does it take to build?
The manufacturer does not provide assembly time or number of pieces, and we do not want to invent a number. What we can say is that an illustrated guide leads the assembly and that the most demanding part is the dial mechanism, which requires precision and a little patience. Plan for one or more quiet sessions rather than a race against the clock: the pleasure of a mechanical model also lies in taking your time, verifying every movement, and understanding what you are assembling. A clear workspace and good light save much more time than rushing.
From what age can one assemble this safe?
The manufacturer indicates a recommended age of 14 and up. This threshold is explained by the delicacy of certain parts, the logic of the mechanism to understand, and the patience needed to adjust the joints without breaking the wood. A teenager passionate about mechanics will find it a real challenge, and an adult will enjoy a very pleasant moment of concentration. A younger child can certainly participate accompanied by an adult, for example, to sort the pieces or test the dials, but the kit contains small elements that must never remain within reach of toddlers under 3.
What can be stored in BASTION once assembled?
The safe is designed as a secret storage for small items: a key, a ring, a USB drive, folded bills, a sweet note, or a collectible coin. The safe measures 12 × 12 × 12 cm on the outside and the door reveals an empty interior compartment; the thickness of the walls and the mechanism reduce the useful space, the exact dimensions of which are not specified. Also, keep in mind that this is a decorative wooden object, not a security safe: it discourages the curious, but protects against neither theft nor fire. For valuable documents or jewelry, a real safe remains indispensable.
Can the model be painted or varnished?
Yes, the raw plywood takes stain, oil, wax, or acrylic paint well. We recommend, however, to finish the surfaces before assembling the moving parts, or to carefully protect the axes and dial discs: a layer of varnish adds thickness that may be enough to seize a mechanism adjusted to the tenth of a millimeter. A walnut or ebony stain will give the look of an antique safe, while a simple coat of clear wax will preserve the lightness of the wood while protecting it from fingerprints. Always test on a scrap piece first.
The dials are hard to turn, is this normal?
On a new model, slight friction is common: laser-cut wood is fitted tightly and the fibers need to "break in" through movement. Rotate each dial several times, without forcing. If resistance persists, rub the axes with a pencil or a bit of candle wax: the graphite and paraffin lubricate the wood without staining it. Also check that no piece is mounted backward or insufficiently pushed in, as an incomplete joint often misaligns the entire mechanism. If the door resists, respect the order: code first, central dial second. Avoid oil or liquid lubricants, which make the plywood swell.
