I don't know if that's technically possible, but how many years have passed since the last service? What's the pattern on timegrapher?
These two factors could motivate giving a full service (which will increase the life of the mov't), instead of attempting partial repair, which is rarely advisable.
My name is Dave from Rhode Island and for the past several years I have developed a passion for watch repairs and building.I found this forum and have learned a lot. Currently working on a watch I picked up from an estate sale. The movement is a Selita SW-500 automatic very similar to the Valjoux 7750. Cant get the crow to pull out to position 3 to set time. It will wind properly and change day and date when pulled to position 2 but will not pull out any further to set time, any thoughts ?
i believe Derbyshire 10mm collets are the same as Levin 10mm's, as I understand it Levin pretty much copied Derbyshire. Not sure if that helps as the Derbyshire collets afaik are less costly than the Levin's. There is also Pultra (Smart Brown). Pultra collets will fit a Levin but not vice versa, they're a little tight.