Pocket Watch Database

Rockford Grade 810

Grade 810 is a 21j Hunting watch maufacturered by Rockford. The size 18s, Model 10 movement features a nickel finish and is adjusted to 5 positions, isochronism and temperature. During the time the watch was manufactured, it would have qualified for railroad service and is considered to be railroad grade. Each movement was fitted at the factory with a double-sunk dial.

Grade 810 Movement Characteristics

  • Size18s
  • Jewels21j
  • ConfigurationHunting
  • FinishNickel
  • Model10
  • SettingLever
  • AdjustedYes
  • Railroad GradeYes

Grade 810 Production Info

  • Total Production1,408
  • Number of Runs7
  • Production Years1897-1905
  • First Serial509,901
  • Last Serial661,200
  • Largest Run500
  • Smallest Run8
  • Most Common Run100

Research Notes

According to Rockford Serial Lists, a total of 1,408 Grade 810 movements were manufactured within seven distinct runs. The Grade 810 and complimentary openface Grade 910 were positioned below the Grade 805 and 905. The primary difference between the grades besides the damaskeening patterns is the 805 features gold jewel settings and a double roller escapement while the 810 features composition settings and a single roller escapement. The 1907 Rockford Catalog describes the Grade 810 as "adjusted to temperature and five positions."

Early Grade 810 movements are marked "Rockford Watch Co. - 21 Jewels - Adjusted" in a fancy serif style with gold inlay, some with the "RG" insignia. The markings and style varies in later runs with some movements additionally marked with the grade number and positional adjustment in blackletter or serif block style.

First Run Transitional Movements:
Some examples from the first run [509,901-510,200] have been recorded as transitional hybrid movements with the old style hairspring stud and balance cock. These transitional movements are in the minority within the first run, as most observations have indicated the run is mostly comprised of true Model 10s.

#510018: Verified as True Model 10 [JH]
#510019: Verified as True Model 10 [JH]
#510078: Verified as True Model 10 [NAWCC]
#510084: Verified as True Model 10 [JH]
#510133: Verified as Transitional Hybrid [JH]
#510134: Verified as Transitional Hybrid [JH]

Other Observations:
#573400: Verified as Marked "Rockford Watch Co. - 810 - 21 Jewels - Adjusted 5 Positions - RG." [JH]
#543200: Reported as Marked "Adjusted 5 Positions"

https://mb.nawcc.org/threads/rockford-810-grade-movement-marking.122591/