#Seiko 5S21: Quartz watch with sweeping seconds hand

In 1988 Seiko released cal. 5S21, a quartz movement with a seconds hand that sweeps, just like on mechanical watches. It released an upgraded movement the following year (cal. 5S42) but for some reason stopped development on them.

The closest thing Seiko produces these days is Spring Drive movements, which are mechanical but regulated by a quartz crystal, thereby having a sweeping seconds hand.

Note: This watch (5S21-5A20) is not for sale.

Get more details about the movement in this video, including links to the technical manual:
https://mizeni.com/movements/seiko-5s21?ref=youtube

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About Mizeni:

I love Japanese watches, in particular Seiko. This channel shows a few of the watches I’ve owned, and I also run a website with details of hundreds of Seiko movements:
https://mizeni.com/?ref=youtube

You can also sign up to the Seiko Collector Weekly newsletter, and get a free PDF of auction tips for Seiko watches:
https://mizeni.com/newsletter?ref=youtube

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Music:

Easy Lemon 30 Second by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/by/4.0/

Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200078

Artist: http://incompetech.com/

Видео #Seiko 5S21: Quartz watch with sweeping seconds hand канала Mizeni – for Seiko collectors