These backs have a USA, Canadian, Australian and British patent. The two types are so similar that I didn't record the type for many clocks I had. For completeness I am showing both types here.
Big 5 Loud Back 1 (Aluminum)
Big 5 Loud Back 1 (Aluminum)
Big 5 Loud Back 1 (Steel)
Back Type 1:
The last "2" in "DES.114262" is very slightly to the left of the "0" in the patent below it
PATD.U.S.A.- DES. 114262 CAN.-RD.1938 - AUST.-RD.19016 GT. BR.- RD.832610 MADE IN U.S.A.
Big 5 Loud Back 2 (Aluminum)
Big 5 Loud Back 2 (Aluminum)
Big 5 Loud Back 2 (Steel)
Back Type 2:
The last "2" in DES.114262 is between the "1" and "6" in the patent below it
PATD. U. S. A. - DES. 114262 CAN.-RD.1938 - AUST.-RD.19016 GT. BR.- RD.832610 MADE IN U. S. A.
