Charles Frodsham, By Appointment to the King, 24 South Molton Street, London

, Movement No. 09955 AD.Fmsz, Case No. 09955, 58 mm, 183 g, circa 1925

A rare water and dustproof expedition deck watch

Case: silver, polished, screw back, winding crown underneath a screwed protective cap and secured by a chain, case maker's punch mark "RN" (Robert Benson North, proprietor of North & Sons 1917-1933, successors to Nicole, Nielsen & Company). Dial: enamel, off-white (Willis), radial Roman numerals, auxiliary seconds, numbered, signed, blued spade hands. Movm.: 2/3 plate movement, frosted, gilt, signed, screwed chatons, English lever escapement, gold screw compensation balance, set diamond endstone on balance.
#40187

Case: very good, slightly worn
Dial: very good
Movm.: very good, capable of running, cleaning recommended