No. 177
19-jewel 18-size nickel adjusted movement with single shaped train and barrel bridge, key or stem wound and lever set, (lacking crown), jewels in settings, capped escape wheel and pallet fork, Reed's patent barrel and maintaining power, straight line lever escapement with moustache counterpoise, bimetallic balance, blued flat spring, Reed's micrometer regulator, gold cuvette, signed white enamel dial with arabic chapters, subsidiary seconds at III o'clock, 56-hour winding indicator at IX o'clock, blued hands, plain M B case with beaded bezels

53mm, 107.8 grams