Le Coultre Co, Swiss, Case No. 30155, Cal. 101, 7 x 22 mm, circa 1970

A lady's rare, decorative miniature wristwatch with the worlds smallest mechanical movement
Case: 18k gold, screwed on back, back winder, solid gold bracelet. Dial: silvered, indexes, blued spade hands. Movm.: miniature rectangular movement, rhodium-plated, "fausses côtes" decoration, 3 adj., 15 jewels, lateral lever, Glucydur balance.

Calibre 101
For over 80 years, the Calibre 101 by Jaeger-LeCoultre has remained the worlds smallest mechanical movement. This prodigious feat of miniaturisation has equipped the most exclusive watches, starting with the one worn by Queen Elizabeth II of England on her Coronation Day in 1953. The dial of the watch is so small that time almost seems to vanish into the background. Created by the skilfull hands of the worlds finest watchmakers, each watch embodies absolute exclusivity and elegance.
Source: http://ladies.jaeger-lecoultre.com/en/since1833/chapter4, as of 10/01/2013.