It will fit your watch model # 16518, 16519, 16520, 16523, 16528, 16568, 16589, 116509, 116518, 116519,116520, 116523, 116528, 116568, 116589, 116598, 116599 and others. This is a high quality 316L stainless steel pusher made particular for the above watch.
eBay