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I use the Horotec hand tools with Delrin tips. I work primarily on vintage stuff. I have one of the fancy hand press vertical plunger tools, but don't care for it. I prefer to feel my way in the alignment.
Any help in identifying this wheel? I’m not sure of its purpose or how it’s held onto the movement? I can’t find any other caliber 900 ETA’s with the same configuration. I’m fairly new to the hobby so please forgive me if this is a ridiculous question. Appreciate any suggestions.