Seiko mechanical movements - Seiko caliber 7S26 Review ...
original from watch-wiki. Seiko 7S26 caliber is one of the automatic movements introduced in 1996. It is non-hacking and non-winding mechanism, with its accuracy ranging from -20 to +49 seconds per day. Equipped with 21 jewels, this fella works quite well with some of the great diver watches as it holds over 40 hours of power reserve, depending on the watch.
DA: 38 PA: 81 MOZ Rank: 34