Grade: Series 11
Series 11
Manufacturer: E. Howard Watch Co. (Keystone)
Manufacturer Location: Waltham, Massachusetts
Movement Serial Number: 1313987
Grade: Series 11
Variation: Arrow.RecoilClick
Model: E
Estimated Production Year: 1916
Run Quantity: 2,000
Grade/Model Run: 6 of 12
Grade/Model Total Production: 25,100
Variant Est. Production: 10,500 (16S-ME-21J-ONL-A5PTI-ARROW.RECOILCLICK)
Size: 16s
Jewels: 21j
Jewel Setting: Burnished Jewels
Movement Configuration: Openface
Movement Finish: Nickel
Movement Setting: Lever
Plate: Bridge Plate
Regulator: Micrometric
Hairspring: Breguet
Standard Dial Type: Single-Sunk
Adjusted: Yes
Adjusted to Position: Yes
Adjusted # of Positions: 5
Adjusted to Temperature: Yes
Adjusted to Isochronism: Yes
Railroad Grade: Yes
Movement Markings: E. Howard Watch Co.
Boston U.S.A.
Railroad Chronometer
Series 11
[Star in Arrow]
21 Jewels
R.R. Adjustment
Temperature
Five Positions
Pat'd '08
Case: Various