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Westclox Big Ben Style 4 Chime Back Type Variations

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All Ben Ben Style 4 Chime Alarm backs that I've seen have five patent numbers.

1 The back has 5 patent numbers.. Big 4 Chime Back Patents
Big 4 Chime Back Patents
1 The back has 5 patent numbers.. Big 4 Chime Back Patents
Big 4 Chime Back Patents

Back Type 1:

The back has 5 patent numbers.

PATENTED U.S.A.
1563431
1709146
1848520
1858563
85916
MADE IN U.S.A.

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