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Cheers Mates Needs some spare to an 6309A movment im working on, somebody knows where to find new or used working gears? See photo Thanks Armand

I am currently underway on my first strip down and service. I have purchased an old SEIKO 6309-510A from ebay and I have stripped it down with no issues so far. I am going to clean the moment using an old Brenray cleaning machine that I have recently overhauled. I have a few questions regarding lubrication, if any one could help me I would be most appreciative. The oils I have are - Moebius 9010, D5, 941, 9501 would I be able to substitute these for the recommended oils by SEIKO? - I have attached the 6309A data sheet. 24._6309A.pdf The next question that I have is regarding the mainspring. From what I've been reading, I believe it would be best to replace this with new, however I think I may struggle to find one that is new. Does anyone know where I could get a new one ? or would you recommend just removing it and cleaning an re lubricating. If the cleaning option is the only one I have what Oil/Grease would I need, could I get away with using anything that I already have.