- Year
- 2016
- Condition
- Excellent
- Set
- Box and papers
- Case
- Tonneau
- Size
- 49.90 × 42.70 × 13.05 mm
Set and condition
Complete set
This RM 055 Japan Edition is accompanied by its original presentation box, warranty card and supporting documentation. The watch and included items are inspected by an expert watchmaker before sale. Additional photographs and video of this piece are available on request.
Original presentation box
Original presentation box and packaging.
Original papers
Warranty card and supporting documentation.
Inspected prior to sale
Reviewed for condition, completeness and functionality. Additional details and photographs are available on request.
Condition photography
Additional close-up images of specific areas are available before purchase.
Overview
White ATZ ceramic with a titanium case middle, released 2015
The Japan Edition pairs a white ATZ ceramic case with a grade 5 titanium middle, the two materials meeting along the flanks, and sets a red crown against the pale ground. The strap is white.
ATZ is formed from tubes of aluminium oxide powder injected at close to 2,000 bar, a process that raises rigidity by 20 to 30% and all but eliminates porosity. Next to diamond it is among the hardest materials in use, and the curved bezel has to be machined with diamond tooling.
Key details
Design and engineering
- White ATZ ceramic1,400 Vickers of scratch resistance and a colour that does not change with wear or exposure.
- Grade 5 titanium case middleRubber is injected at high pressure around the titanium components, insulating the movement from vibration and making the watch more comfortable on the wrist.
- Calibre RMUL2Manual winding and extremely skeletonised, in grade 5 titanium with PVD and Titalyt® treatment, giving rigidity and the surface flatness the gear train needs.
- Free-sprung balance with variable inertiaThe regulator index is eliminated; four small weights set directly on the balance allow accurate and repeatable adjustment.
- Double barrelEnergy is spread across two barrels, equalising torque and reducing pressure and friction on bearings and pivots.
- Luminous hour markers and handsFilled with luminescent material for legibility in low light.
The reference
Technical specifications
| Reference | RM 055 |
|---|---|
| Calibre | RMUL2, manual winding, skeletonised |
| Functions | Hours, minutes, seconds |
| Power reserve | Circa 55 hours |
| Frequency | 28,800 vph (4 Hz) |
| Jewels | 24 |
| Balance | Free sprung, variable inertia, 4 adjustable weights |
| Barrels | Double barrel |
| Shock resistance | Over 500 g |
| Baseplate and bridges | Grade 5 titanium, PVD and Titalyt® treated |
| Case | Tonneau |
| Case dimensions | 49.90 × 42.70 × 13.05 mm |
| Bezel and caseback | White ATZ ceramic |
| Case middle | Grade 5 titanium, rubberised |
| Strap | White rubber |
| Introduced | 2015 |
Buying with HYPA
Purchase with confidence
- Original warranty card included, dated 2016
- Free insured delivery within Australia and Hong Kong, and to Singapore (ships from Hong Kong) · elsewhere quoted
- Payment by bank transfer
- Registered Australian dealerHYPA International Pty Ltd · Registered Victorian second-hand dealer, Registration No. SHD-0018017.
- Direct specialist supportSpeak with the HYPA team before, during and after the purchase.
- Rated 5.0 on Google · 11 reviewsFrom clients of HYPA International on Google. Read the reviews
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