Andrew Nethercott Antiques has dated this piece to the 1940s.
A ship's master clock used for maintaining ship's time (not for navigation) during voyages.

The original painted dial marked
MERCER ST ALBANS ENGLAND
Thick glass in heavy cast brass bezel.
The bezel mounted with a hack mechanism stop / start setting function screw, F-S screw, nurled stainless steel push and turn hand setting and wind knobs.

The metal back case with labels;
MOD. RECORD
CLOCK.MASTER REGULATING
Diameter of the bezel 5,7/8" ir 15cm
Weight 2398 grams.
In very good condition with no damage or repair.
The electric impulse mechanism is not present.
Winds fully and runs well keeping good mechanical time over eight days.
A rare and unusual clock.
Andrew Nethercott Antiques has dated this piece to the 1940s.
Works of art, collectables, scientific and decorative antiques from the 17th - 20th century
You can view the stock and full dealer information on the Andrew Nethercott Antiques Profile Page