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Hello Scott. Hope you do not mind me reviving your thread. I recently got a pair of venus 170 movements for a bargain, U$40. One of them is completely rusted and does not have the main parts and springs. The other one is only missing the stem and one spring. I intend to practise on those until I get some skills to take care of my first watch. A venus 175 which I find beautiful and would like to keep forever. Here are pictures of my junk pieces, one rusted, the other already dismantled. And the untouched 175. I will be following your steps, helped by esembl-o-graf and Mark’s videos. Have you had any more fun with your 170? Lastly, Do you think the Hairspring in the last picture can be reused? Cheers!
This will be more of a stumble-through than a walkthrough, since it's my first watch disassembly (and hopefully reassembly). I plan to do it as a series by replying to this post, so I can get feedback and help as I go (if anybody is interested). I hope that's OK (it will be slow going). I couldn't find any walkthroughs of a Venus 170, so at least I'll contribute some pictures with what I learned along the way. The watch: Purchased from goodwill online. Broken/yellowed crystal, hands bent, corrosion on the case and chrono buttons, dial very marred. Some power in it, as pressing the button moved the chrono second hand until it bumped against the main minute hand, which was bent. Main second hand bent to the dial as well. I did not wind the crown. Balance oscillates. Watch arrived with the back off. Crystal removed with tweezers, and hands removed with the movement still in the case so I wouldn't damage them by fumbling around. Once I had the case screws out I was expecting a movement ring, but there was none. I figured out the case has a bezel and the movement comes out the front. Couldn't find my bench knife but the bezel came off easy with some pressure from a screwdriver at a gap near the 2oc lug. Once the movement was out I was expecting dial screws on the side, but there were none, so I had to learn about dog screws and figured out their locations by studying the backs of cal. 170 dials for sale on ebay. Note the chrono bridge looks unlike any other pictures of a 170 I've found online (including the one other Empire 170 I found), and it's not stamped. Venus logo is not on the balance, but on the other side of the movement (see attached). Perhaps this will help date the movement? Here are the results of these first steps with additional pics attached.