Arnold & Son Instrument Collection
Every Arnold & Son Instrument Collection reference takes a 20 mm watch strap: all 4 we measured.
Arnold & Son Instrument Collection lug width by case size
4 references measured. Updated 2026-10-29.
| Case | Lug width | References | Watch strap attachment | For example |
|---|---|---|---|---|
| 44 mm | 20 mm | 2 | — | 1ATAR.L01A.C120A, 1DTAR.L01A.C120A |
| 45 mm | 20 mm | 2 | — | 1TPAR.S01A.C125A, 1TPAS.S01A.C124S |
Every Arnold & Son Instrument Collection reference
Other Arnold & Son families
Inside each one the lug width often changes: it is the reference that decides.
All Arnold & Son families → · Why the size changes inside a family →