A LADY'S ART DECO DIAMOND AND BLACK ONYX WRISTWATCH, BY J. E. CALDWELL & CO.

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A LADY'S ART DECO DIAMOND AND BLACK ONYX WRISTWATCH, BY J. E. CALDWELL & CO.

The tonneau shaped platinum case with silvered dial, Arabic numeral chapters and a diamond and black onyx-set bezel to the black satin band (movement signed by Audemars Piguet)

Signed by J. E. Caldwell & Co.