FROM THE AMERICAN HOROLOGY ARCHIVE:
Elgin National Watch Co. Grade: 345
Manufacturer: Elgin
Manufacturer Location: Elgin, Illinois
Movement Serial Number: 26683313
Grade:345 Model:3 Class:114
Estimated Production Year:1920-24
Size: 12s
Jewels:17
Jewel Material: Ruby & Sapphire
Jewel Setting: Screw-Set Movement
Configuration: Open face Movement
Finish: Nickel Movement
Setting: Pendant
Plate:3/4 Plate
Double Roller: Yes
Barrel: Going Balance
Type: Expansion Balance
Jewel Material: Ruby
Train: Quick
Regulator: Moseley.
Hairspring: Breguet
Standard Dial Type: Single-Sunk
Adjusted: No Railroad
Grade: No U.S.
Patents:596407,77078,585025
Data Research: 1927/1950 Elgin Serial List Case: 20 year gold filled B & B Royal