Pocket Watch Database
Seth Thomas Size 18s Model 1: Overview & Production
Model 1 Features
Movement Diagram
Example Image
Dial Plate Image
Note: Diagrams and photos displayed are intended to serve as a represenation of this model.
Plate cut, finishing style, jewel count, regulator, and other features may differ between grades within the same model designation.
Plate cut, finishing style, jewel count, regulator, and other features may differ between grades within the same model designation.
| Size | 18s |
| Configuration | Openface |
| Plate | 3/4 |
| Setting | Lever |
| Finish | Gilt |
| U.S. Patents | 310865, 325568 |
| Model 1 Image Gallery | |
Model 1 Production
| Total Production: | ~10,900 |
| Est. Production Years: | 1885 - 1886 |
| Earliest Serial: | 1 |
| Latest Serial: | 10,900 |
| Runs: | ~8 |
| Smallest Run: | 200 |
| Largest Run: | 4,500 |
| Distinctive Grades: | 3 |
Model 1 Production Segments
| Model 1 (All Variations): 10,900 ETP |
| Gilt: 10,900 (100.00%) |
| Openface: 10,900 (100.00%) |
| Lever: 10,900 (100.00%) |
| 11j: 10,200 (93.58%) | 15j: 700 (6.42%) |
Model 1 Technical Specifications
| Movement Thickness (with dial): | 8.82mm |
| Pillar Plate Diameter: | 45.67mm |
| Core Diameter: | 42.66mm |
| Weight (with dial and hands): | 57.39g |
| Measurement Notes: | Weight taken without hands. |
Note: Measurements may vary slightly depending on features, style, and time of production.
These measurements were taken on movement #928.