Description
Custom B2B sapphire component · SWC-13856742
Product overview
Transparent Sapphire Case for ETA 6497 Movements is a movement-specific transparent case. A transparent sapphire case architecture developed around the ETA 6497 movement envelope, crown position and visible mechanical presentation. It is supplied as a custom manufactured component rather than an off-the-shelf finished watch, so the final specification is established from your drawing, 3D model and assembly requirements.
Single-crystal sapphire offers excellent scratch resistance, chemical stability and a premium visual character. Successful watch-case production, however, depends on more than material selection. Wall transitions, holes, internal corners, polishing access, cosmetic zones and mating-part clearances must be engineered as one system.
Why sapphire suits this watch-case project
Mohs 9 surface hardness
Exceptional scratch resistance helps polished case surfaces retain clarity and crisp reflections through normal wear. Sapphire is highly resistant to scratching, but no material should be described as absolutely scratch-proof.
Movement-visible architecture
Optical transparency allows the case body to reveal the movement through its walls and transitions, creating a three-dimensional view that a metal case cannot provide.
Stable premium appearance
Chemical stability, corrosion resistance and color through the material support long-term visual quality without relying on a surface plating for the core effect.
Typical applications
- ETA 6497 skeleton watches
- Exhibition-style watch projects
- Independent watch brands
- Low-volume mechanical collections
Reference specifications
| Material | Saphirkristall |
|---|---|
| Manufacturing route | Blank preparation, precision grinding / CNC shaping, staged polishing and project-specific inspection |
| Final tolerance | Confirmed after drawing and datum review; critical dimensions quoted individually |
| Documentation | Dimensional or visual inspection records available when agreed before order |
Reference values describe the current product concept or available project direction. The purchase specification must be confirmed on the approved drawing and quotation.
Engineering points to confirm
- Confirm the exact movement, spacer and dial stack
- Locate crown and stem features from assembly datums
- Review case-back fastening and gasket space
- Provide complete 3D files for collision and access review
Manufacturing and finishing approach
The manufacturing route is selected according to part envelope, crystal orientation, color, material allowance and feature access. Precision grinding and CNC shaping establish the main geometry. Holes, steps, shoulders and cavities are produced in a sequence intended to protect edge strength and preserve stable datums. Polishing is then planned around the surfaces that remain visible in the final watch.
Not every internal surface can be polished to the same visual standard. Deep cavities, narrow slots and interrupted features may limit tool access. Mark primary cosmetic zones, secondary visible zones and hidden functional areas separately so the process and quotation reflect the real product priorities.
Quality control
Inspection can include critical dimensions, hole position, wall sections, edge condition, surface appearance, color consistency and reference-component fit. The exact methods and reporting level should be agreed before production. For cosmetic evaluation, define the light source, viewing distance, background, inspection time and allowed defect size rather than relying on subjective terms such as “perfect.”
Recommended RFQ package
- 2D drawing with tolerances and datums
- STEP or other neutral 3D model
- Movement and mating-part information
- Material, color and orientation
- Cosmetic zones and finish requirements
- Prototype quantity and annual demand
- Inspection report requirements
- Delivery location and target schedule
Prototype and production
For a new sapphire architecture, prototype validation is strongly recommended before batch release. The sample review should cover the complete assembly—not only the loose sapphire part—including movement clearance, crown alignment, gasket space, fastener load, visual alignment and service sequence. After approval, the controlled drawing and agreed sample become the reference for subsequent production.
Frequently asked questions
Is this a finished branded watch?
No. This listing represents a custom sapphire case or component manufacturing capability for B2B projects. Movements, straps and branded watch assembly are not included unless specifically quoted.
Can the dimensions, color and finish be customized?
Yes, subject to material availability and manufacturing feasibility. Provide drawings and a physical color reference whenever possible.
Why is a 3D model required?
Complex cavities, movement clearances and polishing access cannot be evaluated reliably from a title or outside dimensions alone. A 3D model supports DFM review and accurate quotation.
How long does production take?
Lead time depends on geometry, material, quantity, inspection requirements and whether a prototype is required. The confirmed schedule is stated in the project quotation.
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