A GOLD SHELL PURSE CLOCK, SCHLUMBERGER, TIFFANY & CO.

Details
A GOLD SHELL PURSE CLOCK, SCHLUMBERGER, TIFFANY & CO.
The textured gold hinged cockle shell opening to reveal a pop-up watch, the circular silver-colored dial with gold abstract chapters and hands, within a gold case
Signed by Schlumberger, Tiffany & Co.
Literature
For an illustration of a similar watch see:

P. Proddow & D. Healy, "American Jewelry", Rizzoli, New York, 1987, p. 180