I recently got hold of several boxes with horological stuff. Parts and tools. I have most of it sorted but I got stuck on some of the tools.So my question is what are these tools used for? 1. My guess is that this tool is used to shape inner part of a mainspring for clocks. Does it make sense? 2. I have no idea. First I thought it was used to cut holes in mainsprings but that does not seem right when I look closer .... Any suggestions? 3. Holder for inserting roller jewel? 4. First I thought is was something related to fountain pens but doesn't make sense. Perhaps another tool for roller jewels? What do you think? PS. About size: There is 10mm beween the lines on the background paper. DS.