Typical half-plate reverse-fusee movement (open face set) of the design normally associated with the Kullberg firm, with Sutton’s ‘sliding-spring’ keyless work and cap jewels on balance (diamond), lever and escape, the 14-size frame stamped JP (Joseph Preston). Single-roller detached lever escapement of Savage 2-pin design with gold lever, the roller retaining its original ‘wide’ jewel, but the narrow ‘Savage’ notch later modified to act as a passing crescent. Compensation balance, spiral balance-spring. Signed enamel dial in perfect condition, blued-steel hands. 43 mm diameter, 8.5 mm deep, not including centre arbor.
Clifford Lupton, associated with Barraud – see Jaggers Supplement, pages 178 to 183, for extensive information concerning this fine craftsman.
George Savage, Huddersfield and London, inventor (circa 1814) of what I consider the best form of detached lever escapement, in which the safety pin also receives the impulse. With finer tolerances than the normal detached lever escapements, the ‘Savage 2-pin’ as it has come to be called, was always more expensive to fit and was generally fitted in the best work. Examples are much more uncommon than the English Massey and single-roller variants, in its jewelled form even more so.
Joseph Preston, the most famous of Prescot watch rough movement manufacturers, supplier of top quality frames to most of the best English finishers.
The staff was probably re-pivoted at some time and, rather than get the tolerances as good as they are needed with this escapement, the lazy repairer decided to do the bodge of taking a file to the notch. In doing so, opening it out and thus making the action that of a standard lever. Luckily the wide jewel has survived and with some care a replacement roller of the correct Savage form could be made and the original action re-instated. Not cleaned by me and ticking happily when wound, and priced accordingly for being altered.