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Hamilton 31
18000 BPH SHOCK ADJ STUD HOLD
Ligne: 7.75'''
Jewels: 17
Lift Angle: 52°
Power Reserve: 44 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: 1958-1967
Diameter: 17.5 mm
Height: 3.8 mm
Hands: 1.20 x 0.70 x 0.20 mm
Base: Eta 2360
Mainspring Listing
| Dimensions | GR Reference # | End Type |
| 1.30 x 0.080 x 240 x 7.0 mm | GR3202 | Manual |
Parts Listing
| Part Description | Reference # | Alternate | Discontinued |
| HAMMER SPRING | X/4745 | 4042 | |
| MAINSPRING 1.30-.08-240 7 | MS-413E | GR 3202 | |
| PALLET ARBOR | 72S/7P | 714/ETA 2360 | |
| ROLLER 155X75X33 | 82S/143R | 730/36 | |
| STAFF, INCA BAL .75 COL .48 | 100/1292 | ||
| STEM | 200/1027F | 200/1027F | Yes, use 401/121 |
| STEM, FEMALE OA 7.00 | 360/213 |
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