Important Collectors Wristwatches, P...
Geneva, Hotel Des Bergues, Oct 20, 1991
Loveday, Wakefield, No. 1356.
Three quarter plate center seconds movement with fusee, Patent Union Chronometer escapement drawn from the Robin detent lever escapement, circa 1860. White enamel dial, blued-steel hands.Chamb. p. 136. O.T.L. No. 35.