Arnold & Son · Ultrathin
Arnold & Son Ultrathin Tourbillon Skeleton
Reference 1UTBR.Z01A.C246R · Classic · 41.5 mm
Specifications
- Reference
- 1UTBR.Z01A.C246R
- Family
- Ultrathin
- Category
- Classic
- Status
- Current
- Case material
- 18 ct rose gold, Platinum
- Case diameter
- 41.5 mm
- Case thickness
- 8.4 mm Official
- Lug-to-lug
- —
- Lug width
- —
- Water resistance
- 30 m
- Bezel
- —
- Calibre
- A&S8320 Official
- Power reserve
- 100 h
- Frequency
- 21,600 vph (3 Hz)
Official product page · retrieved October 24, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
No lug-to-lug figure exists for this reference yet, so fit cannot be computed.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 8.4 mm | Official | Arnold & Son | October 24, 2026 |
Lug-to-lug
No source gave this figure yet.
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official Arnold & Son · retrieved October 24, 2026
Other versions in the same case
These references share this case and differ by metal, dial, bracelet or bezel. The figures on this page apply to all of them, except where a reference shows its own thickness.
- 1UTBX.Z01A.C245X · Platinum
Other Ultrathin references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Ultrathin Tourbillon (red gold, 41.5 mm) 1UTBR.I01A.C246R | 41.5 mm | 8.3 mm | — | A&S8300 |
| Ultrathin Tourbillon (red gold, 42 mm) 1UTAR.Z01A.C156A | 42 mm | 8.6 mm | — | — |
| Ultrathin Tourbillon (platinum) 1UTBX.F01A.C208A | 41.5 mm | 8.3 mm | — | — |
Other Arnold & Son models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Nebula 41.5 1NEAR.S01B.C179A | 41.5 mm | 8.73 mm | — | A&S5201 |
| Perpetual Moon 41.5 (red gold, 11.3 mm thick) 1GLBR.N01A.C0246A | 41.5 mm | 11.3 mm | — | A&S1512 |
| DSTB 42 1ATCR.F01A.C1242A | 42 mm | 12.95 mm | — | A&S6203 |
| DSTB Stop-Seconds 1ATCR.N01A.C0246A | 42 mm | 12.95 mm | — | A&S6303 |
| Constant Force Tourbillon 11 1FCBX.Z01A.C0232X | 41.5 mm | 13.7 mm | — | A&S5219 |
| Perpetual Moon 41.5 1GLBX.Z03A.C1479X | 41.5 mm | 11.67 mm | — | A&S1512 |
Show 11 more
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Perpetual Moon 41.5 (platinum, 11.3 mm thick) 1GLBX.F01A.C285X | 41.5 mm | 11.3 mm | — | A&S1512 |
| Perpetual Moon 41.5 (steel) 1GLBS.M01A.C1242S | 41.5 mm | 11.3 mm | — | A&S1512 |
| Time Pyramid 42.5 1TPER.F01A.C1250A | 42.5 mm | 10.72 mm | — | A&S1615 |
| Longitude 1LTAT.F01A.N001U | 42.5 mm | 12.25 mm | — | A&S6302 |
| Nebula 40 1NEGS.B01A.S135D | 40 mm | 9.1 mm | — | A&S5201 |
| HM London Skyline 1LCDS.M03A.C0704S | 39.5 mm | 7.82 mm | — | A&S1001 |
| Luna Magna 1LMAS.T01A.C1322D | 44 mm | 15.9 mm | — | A&S1021 |
| Perpetual Moon 38 1GLBR.A01A.C282A | 38 mm | 10.44 mm | — | A&S1612 |
| Nebula 38 1NECS.B03A.C180A | 38 mm | 8.73 mm | — | A&S5201 |
| Globetrotter 42 1WTBS.F01A.C1242S | 42 mm | 15.1 mm | — | — |
| Globetrotter 45 1WTAS.S02C.C155S | 45 mm | 17.26 mm | — | A&S6022 |