Rockford Watch Company 16 Size Trolley/Street-Railway Grades (550 & 555)
cited in collector research on street-railway/trolley conductor watches (Larry Treiman, "Timing the Trolleys"); Rockford closed in 1915 as electric railways were standardizing timekeeping needs
2 references
“Differs” marks a spec with different recorded values. — means not recorded.
| Spec | 550 16s, lever set, steel escape wheel, single roller, adjusted 3 positions, street-railway/trolley-market grade | 555 16s, lever set, steel escape wheel, single roller, adjusted 3 positions, street-railway/trolley-market grade |
|---|---|---|
| Caliber | 16 size | 16 size |
| Movement maker | Rockford Watch Company | Rockford Watch Company |
| Movement type | Manual | Manual |
| Jewels | 17 | 17 |