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Or tell him to get a quartz!! Sent from my ONEPLUS A6003 using Tapatalk

It looks like the same design as the 7S26 barrel Mark made a video about it, the same procedure probably applies https://m.youtube.com/watch?v=DlyNICm2N9k

Yes you sure can. I will post it here later. I'm reassembling that pocket watch I showed photos of

looks really fine! May i perhaps get to know what his recipe is?

Thanks, Im leaning more towards it is the mainspring if anything.

I serviced a watch like yours a few months ago. Mine had somewhat similar issues with the seconds hand. I just cleaned the movement, lubricated it and then assembled it back together. You'll find a few videos made by someone on how to take that movement apart on youtube but they're not very good if you don't have any experience. If you don't have experience with working on watches and if you don't have the right tools I suggest you take it to a watchmaker or leave it alone until you get more experience (if you're planning on doing this as a hobby or something).

Back in the 70’ and 80’s these units were plentiful and you just ordered a new one. Seiko used to require that the unit should be replaced (I think) every 5 or 7 years. So you should not really take them apart. Times have changed and parts have become obsolete. Follow Marks video which oli has kindly found for you and providing you are careful you should be alright.

That’s a tough shout as they weren’t exactly abundant when first made. Maybe you could see if a friendly independent AD would supply for you (they may insist on fitting)... e.g https://www.thewatchhospital.co.uk/branches/