Approx.45mm diameter, ca. 98g, extremely rare 3-piece case, foldable on both sides, worked in green gold and red gold, high relief on the back in 3 colors, representation of a couple of lovers at the request, under the back cover an arched enamel painting with erotic scene, bell, signed Joseph Bertrand Paris No. 826, repetition of hours and quarter hours, very well preserved Enamelled dial and golden hands, manageable and very well preserved, striking but in need of adjustment. Spindle watches with erotic paintings only came into fashion around 1800. Previous specimens are extremely rare and few are known today. But it is sensationally rare that this specimen also has a work with repetition here.