Thomas Mercer Carriage Chronometer, 8 days power reserve, spring detent escapement

A rare table carriage chronometer
with 8 days power reserve
Thomas Mercer
Ltd., St. Albans, English
Marlborough
ca. 1967
spring detent escapement
according to Thomas Earnshaw
in a trapezoidal case

The Marlborough carriage chronometer
The fully jeweled 8 day movement incorporates the traditional detent escapement, fusee and chain. As befits a travelling timepiece is compensated for changes of temperature between 4 and 35 degrees. Every part of the superb movement, clearly visible through the glass case, is meticulously hand-finished. The case with its sloping sides and bevelled glasspanels is modern in concept but of an ageless simplicity equally at ease in antique or modern surroundings.

By definition, the carriage clock is a portable timekeeper different from a watch, designed for the use on a journey. The popular conception is of a brass and glass case with a carrying handle. So far this is equally true of the Mercer "Marlborough" with one important exception - the Chronometer movement.

Details
Dial
silvered
Roman numerals
inner five-minute divisions
power reserve indication
auxiliary seconds
blued spade hands
signed
good condition with traces of use

Movement
brass movement
decorated
compensation balance with 2 weights and 2 screws
palladium helical balance spring
chain/fusee
spring detent escapement
blued screws
stop device for balance
the movement is is fully functional and running very well

Case
brass, gilded, brush-finished
facet glazed on three sides
height ca. 15cm, width ca. 12cm down und 15cm on the top, depth ca. 8,7cm
handle on top
very good condition with slight traces of use
The watch is fully functional, is running very well and is in a very good, used condition