For SB: Seiko 6105-8110 6/74 Evaluation, July 8, 2026

Looking at a semi-restored but recently not-serviced 6105 from June 1974. The watch is a decent runner, currently showing full-power amplitudes in the 210-ish range, with 1.0 beat error. Movement shows tool marks and other signs of handling but is clearly original. Balance cock is the beveled edge type, versus the main plates being the vertical-edged type. Not a big deal, someone swapped the balance cock at some point. It happens. Cosmetically the watch is fine and won't need attention. This looks to be a service situation only. Questions are if the mainspring arbor ends are jeweled, and if the crown has been rebuilt. www.kleinvintagewatch.com   / kleinvintagewatch   https://www.instagram.com/ No ammonites were harmed during the making of this video