FS: Zenith 18k (I believe) Pink Gold Three-Register Chronograph Reference: 19529 Case: Large 37.25mm diameter lovely warm, pink / rose gold case has been previously polished but remains full with thick lugs and original brushed finishing on mid case band and hallmark present at 9. Movement: Zenith Caliber 156H - manually wound column wheel chronograph. If you're a column wheel fanatic like I am, this movement is divine and has one of my favorite start/stop and reset actions/feeling of any I've handled from that era. Watch winds, sets, runs, and keeps time as it should. I have not timed the watch, but have always found it to be astonishingly accurate.