seller claims these to be NOS. but i dont recall seeing a T-H chrono w/ a date sub-register like this. and the sub-registers are not the typical equi-distant placement found on most swiss quartz chronos. these have a somewhat tricompax layout as found in many auto chrono movts.

smells fishy, but maybe i missed this line of quartz chonos.

OLD VINTAGE TAG Heuer Chronograph movement , NEW OLD STOCK!!Check out the photos. Would add to anyone's parts reserve or use to upgrade that TAG. Measures 28.4 MM in diameter. I found this at a watch show in ZURICH last year, they are packed in factory shipping plastic holders. Movement Marked "TAG HEUER 3.89, RH 50-51-52, 9 jewel, SWISS". Dail marked "TAG HUER, t SWISS MADE t" .