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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThe 2025 Armin Strom Mirrored Force Resonance Rose Gold pairs an 18K rose-gold case with a black, off-center guilloché dial. Its manually wound ARF21 calibre uses two regulating systems linked by the maker’s resonance clutch, with twin seconds displays that make the mechanism’s paired architecture visible. Armin Strom lists the reference RG25-RF.90 as a 15-piece edition at CHF 88,000.
What distinguishes the RG25-RF.90?
This is a rose-gold variant of Armin Strom’s Mirrored Force Resonance family, announced on 13 August 2025. Its contrast is deliberate: a warm-toned 18K rose-gold case frames a black, off-center dial with guilloché and azurage finishing. The dial has applied polished baton indexes.
Armin Strom says the hand-crafted sunray guilloché is cut on a traditional rose-engine lathe. A dark-grey Alcantara strap with grey stitching and an 18K rose-gold pin buckle completes the exterior.
How does the Mirrored Force Resonance work?
The manually wound manufacture calibre ARF21 contains two independent regulating systems, each with its own balance wheel and hairspring. Armin Strom connects them with a resonance clutch. The maker describes resonance as synchronization between the systems through transfers of vibrational energy, and says the arrangement is intended to improve precision and chronometric consistency.
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The watch displays hours, minutes and two seconds indications. According to Armin Strom, the pusher at 2 o’clock resets both seconds counters, giving the wearer a way to observe the twin indications together. The brand’s stated performance rationale is not the same as a measured result: the official material cited for this model does not provide an independent chronometric test figure.
Case, dial and movement specifications
| Specification | Armin Strom’s published figure |
|---|---|
| Reference | RG25-RF.90 |
| Case | 18K rose gold |
| Diameter | 43 mm |
| Height | 11.55 mm |
| Lug-to-lug | 49.60 mm |
| Dial | Black, off-center, guilloché and azurage; applied polished baton indexes |
| Crystal and case back | Sapphire with anti-reflective treatment |
| Water resistance | 3 ATM |
| Movement | Manually wound manufacture calibre ARF21 |
| Functions | Hours, minutes, twin seconds, resonance and flyback |
| Regulating systems | Two independent systems connected by a resonance clutch |
| Power reserve | 48 hours |
| Frequency | 3.5 Hz (25,200 vibrations per hour) |
| Jewels and components | 39 jewels; 276 components |
These figures are the manufacturer’s 2025 specifications. The 3 ATM rating is the published water-resistance figure; it does not by itself establish suitability for swimming or diving.
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- 5030D QUARTZ CHRONOGRAPH: The movement powers timekeeping and elapsed-time measurement. Two pushers control start, stop and reset functions, while the central chronograph hand and three-register display keep timing information clearly separated.
- COMPACT THREE-REGISTER LAYOUT: A black dial, three subdials and tachymeter scale give T026C its own identity within the series. The 38mm case keeps the detailed chronograph display compact, while applied markers and contrasting hands support quick reading.
- DOMED SAPPHIRE AND C3 LUME: The domed sapphire crystal uses an inner anti-reflective coating to help reduce reflections while protecting the dial. C3 green lume on the hands and hour markers supports reading after exposure to light.
- 100M WATER RESISTANCE FOR DAILY USE: The stainless steel case is rated to 100M for hand washing, rain and routine exposure around water. Keep the chronograph pushers untouched while the watch is wet or underwater to help maintain the case seal.
- STEEL BRACELET AND COMPACT FIT: The 316L stainless steel bracelet has quick-release spring bars and a solid micro-adjust clasp. The case is 47mm lug to lug and 12.3mm thick, while the 19mm lug width keeps the bracelet in proportion with the 38mm case.
Finishing and construction
Armin Strom describes the movement as finished with hand-bevelled bridges, polished and matte surfaces, black-polished screws, perlage and circular graining. The company also says each watch is assembled twice to check mechanical precision and finishing. These are the maker’s descriptions of its processes, rather than independently assessed findings.
Edition size, price and availability
Armin Strom’s launch material and product page list the RG25-RF.90 at CHF 88,000 and limit it to 15 pieces. The launch release is dated 13 August 2025. The brand’s product page directs customers in the United States to contact its sales team; regional pricing, stock and access can change, so confirm current details with the manufacturer.
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Claude Greisler, Armin Strom co-founder and master watchmaker, said the rose-gold case marked a milestone for the series and brought a warm tone to its mechanics and craftsmanship. That is the maker’s characterization of its material choice; the watch’s appeal will depend on whether a buyer prefers that contrast and the case’s proportions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who might appreciate this version?
The defining choice is not simply gold versus steel: it is the combination of a substantial 43 mm case, a dark decorative dial and a movement architecture that presents two seconds indications. The published dimensions, 48-hour reserve and 3 ATM water resistance offer concrete points for judging fit and everyday requirements, while the 15-piece limit and CHF list price place it firmly in rarefied territory. No independent accuracy result for this exact reference is established in the manufacturer sources cited here.
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