Pocket Watch Database
Rockford Size 16s Model 4: Grades
Model 4 Grades
| Grade | Total Grade/Model Production | Runs | Est. Production Years | Earliest Serial | Latest Serial | Profile Code |
|---|---|---|---|---|---|---|
| Unknown | 1,000 | 1 | 1914 - 1914 | 930,001 | 931,000 | 16s-M4 |
| 400 | 1,400 | 3 | 1903 - 1908 | 625,001 | 762,500 | 16s-M4-17j-HNL/HNP |
| 500 | 240 | 3 | 1899 - 1903 | 546,601 | 628,100 | 16s-M4-21j-HNL |
| 501 | 60 | 1 | 1900 - 1900 | 566,941 | 567,000 | 16s-M4-21j-HNL |
| 510 | 500 | 3 | 1899 - 1903 | 546,701 | 628,800 | 16s-M4-21j-HNL |
| 520 | 600 | 5 | 1899 - 1903 | 546,801 | 628,300 | 16s-M4-21j-HNL |
| 540 | 1,050 | 5 | 1899 - 1903 | 544,801 | 624,800 | 16s-M4-21j-HNL |
| 550 | 800 | 2 | 1899 - 1900 | 544,501 | 558,500 | 16s-M4-17j-HNL |
| 561 | 5,000 | 4 | 1902 - 1913 | 603,001 | 920,000 | 16s-M4-17j-HNP |
| 572 | 13,500 | 17 | 1902 - 1915 | 608,001 | 937,500 | 16s-M4-17j-HNP |
| 586 | 3,000 | 3 | 1911 - 1913 | 859,001 | 902,000 | 16s-M4-15j-HNP |
| 620 | 700 | 2 | 1905 - 1908 | 662,801 | 760,000 | 16s-M4-21j-HNP/HNL |
| 630 | 1,500 | 3 | 1908 - 1908 | 749,601 | 777,000 | 16s-M4-17j-HNP |