Calibre catalogue / Hand-wound / 2740A
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2740A fitting drawing (PDF)
Dimensions, stem height and hand fitting. Keyed to the base calibre, so sibling references share this drawing. Supplied for casing and fitting purposes only.
Hand-wound
2740A
2 Series
- —Small seconds
- —Skeletonised and engraved
| Specification | |
|---|---|
| Size | 31.5 mm (1.240 in) |
| Height | 4.73 mm (0.186 in) |
| Jewels | 22 |
| Frequency | 21,600 vph (3 Hz) |
| Power reserve | 42 h |
| Finish colour | White |
Check dimensions against the fitting drawing before tooling a case.
Same base calibre
Variants
2700A
Hand-wound
Skeletonised and engraved · Centre seconds
31.5 mm · 4.73 mm · 42 h
2705A
Hand-wound
Centre seconds · Skeletonised
31.5 mm · 4.73 mm · 42 h
2720A
Hand-wound
Skeletonised and engraved · Centre seconds
31.5 mm · 4.73 mm · 42 h
27D0A
Hand-wound
Centre seconds · Skeletonised
31.5 mm · 4.73 mm · 42 h
27E0A
Hand-wound
Centre seconds · Skeletonised
31.5 mm · 4.73 mm · 42 h
27G0D
Hand-wound
Centre seconds · Skeletonised
31.5 mm · 4.73 mm · 42 h