Arnold & Son · Ultrathin

Arnold & Son Ultrathin Tourbillon (platinum)

Reference 1UTBX.F01A.C208A · Classic · 41.5 mm

XIIIIIIIIIVVVIVIIVIIIIXXXIØ 41.5 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
1UTBX.F01A.C208A
Family
Ultrathin
Category
Classic
Status
Current
Case material
Platinum
Case diameter
41.5 mm
Case thickness
8.3 mm Official
Lug-to-lug
—
Lug width
—
Water resistance
30 m
Bezel
—
Calibre
Hand-wound · calibre not named by the brand

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.

XIIIIIIIIIVVVIVIIVIIIIXXXINo lug-to-lug dataFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmNo lug-to-lug dataCase diameter 41.5 mm
Side view, across 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
8.3 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.

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 Skeleton 1UTBR.Z01A.C246R 41.5 mm 8.4 mm — A&S8320
Ultrathin Tourbillon (red gold, 42 mm) 1UTAR.Z01A.C156A 42 mm 8.6 mm — —

Other Arnold & Son models

Watch Ø Thickness Lug-to-lug Calibre
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
Perpetual Moon 41.5 (platinum, 11.3 mm thick) 1GLBX.F01A.C285X 41.5 mm 11.3 mm — A&S1512
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
Perpetual Moon 41.5 (steel) 1GLBS.M01A.C1242S 41.5 mm 11.3 mm — A&S1512
Show 11 more
Watch Ø Thickness Lug-to-lug Calibre
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
Longitude 1LTAT.F01A.N001U 42.5 mm 12.25 mm — A&S6302
Time Pyramid 42.5 1TPER.F01A.C1250A 42.5 mm 10.72 mm — A&S1615
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
Nebula 38 1NECS.B03A.C180A 38 mm 8.73 mm — A&S5201
Perpetual Moon 38 1GLBR.A01A.C282A 38 mm 10.44 mm — A&S1612
Globetrotter 42 1WTBS.F01A.C1242S 42 mm 15.1 mm — —
Globetrotter 45 1WTAS.S02C.C155S 45 mm 17.26 mm — A&S6022

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