Hello, I am new to this forum. I own a UG Compur and a UG Aero Compax Cal. 287, the latter being a family heritage. Unfortunatelly the click spring of the caliber 287 in the Aero Compax broke. After disassembling it we found out that it was not an original piece anyway... So, I am looking for this spare part - a click spring for Cal. 287 (obviously I am ready to pay for it). I have found nothing on Ebay... just a click spring for cal. 281 (which I boughy anyway), which does not fit though... Thanks a lot for your help! Martin A few pictures of the watch and the broken (not original!!) click spring are attached.