The watch that I pulled the pinion off of yesterday pre-dates 1900 and has the the same dimple ground out of the side. The trench watch that I worked on a while ago was from 1913 and has the type of bent pin system that I'm talking about, hence my concern about you damaging your watch. http://www.watchrepairtalk.com/topic/1520-trench-watch-help/?hl=%2Btrench+%2Bwatch Having said all of the above, if as you say you cannot turn the pin using a pin vice it suggests otherwise. Is it possible to
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