Seiko 6309 Watch Repair: How to Ream and Jewel the Barrel Arbor

In this Watch Werkz tutorial, I walk you through the process of reaming and installing a new jewel for the mainspring arbor in a vintage Seiko 6309. This upgrade replaces the factory metal bushing with a proper jewel bearing—dramatically improving long-term performance, reducing friction, and restoring precision to the barrel assembly. This is an essential upgrade for anyone servicing worn Seiko 6309s or other vintage Seikos with metal bushings at the barrel arbor. Website: www.watchwerkz.com eBay Store: https://www.ebay.com/usr/watch_werkz Instagram:   / watch.werkz   TikTok:   / watch.werkz   Facebook:   / thewatchwerkz   YouTube:    / @watchwerkz   #Seiko6309 #WatchRepair #VintageWatches #Horology #Watchmaking #Mainspring #WatchWerkz #SeikoMod #Jeweling #Watchmaker #MechanicalWatch #WatchTutorial #SeikoRestoration #DIYWatchRepair