Pocket Watch Database

Movement Specs Value Parts Ad Archive 1 Sell Your Watch Save to My Collection Print Page Find a Mainspring Find a Balance Staff
Sell Your Watch Save to My Collection Print Page Find a Mainspring Find a Balance Staff

Rockford Watch Parts: Grade

Part Categories

Mainsprings

Part Factory Part Number
Mainspring 644 Part Number: JA550
Company: Rockford
Size: 18
Factory No.: 644
Alt Factory No.:
Dennison Width: 20
Dennison Strength: 2
Length: 22
Metric Width: 2.90
Metric Strength: 0.22
End: T-End
Mainspring 822 Part Number: JA551
Company: Rockford
Size: 16
Factory No.: 822
Alt Factory No.:
Dennison Width: 18
Dennison Strength: 3
Length: 20.5
Metric Width: 2.70
Metric Strength: 0.205
End: T-End
Mainspring 932 Part Number: JA552
Company: Rockford
Size: 12
Factory No.: 932
Alt Factory No.:
Dennison Width: 11
Dennison Strength: 5.5
Length: 18.75
Metric Width: 2.00
Metric Strength: 0.172
End: T-End
Mainspring 1077 Part Number: JA553
Company: Rockford
Size: 0
Factory No.: 1077
Alt Factory No.:
Dennison Width: 8
Dennison Strength: 8
Length: 13.75
Metric Width: 1.70
Metric Strength: 0.14
End: T-End