This is a great timepiece with a dirty little secret. I believe it to be a Swiss watch.  15 jewels, 18 size, stem wind, pin set, in a .875 silver hunter case. There are no markings on the movement but the case is marked Argent .875 and has the standing bear stamp which leads me to believe it is Swiss.  Inside the back cover, on top of the works cover is another secret cover.  When opened, it shows a male and female caught in the act.  A spring mechanism engages when the cover is opened and the male thrusts back and forth for about 30 seconds before the spring winds down.  to rewind the spring, just close the secret cover.  The figures are in rose gold and the chair and floor is in yellow gold.  The curtains are red enamel and the chair cushions are in green enamel.  There is a little dog on his hind legs taking it all in and he looks like he may want to get in on the action too.  The watch face is in perfect condition with roman numerals, gold filigree minute/hour hands and a separate second hand.  The watch runs beautifully.  The case is in overall VG condition with no scratches or dents.  There is a blank crest on the front for engraved initials if you want to have it personalized.  Antique erotic watches are very scarce as they were only for the wealthy. Don't miss this beauty  Reasonable opening, no further reserve.  Happy to answer any Q's.