This is a nice example of an early Seiko digital, most if not all of the early models had the pushers at the front. This one is a 1976 version. I paid £20.00 for it at a local watch fair, it was working but would need some attention. (See photos, also bought at the same time as the M159)
It took months to find a new old stock crystal and was one of the hardest crystals I have ever fitted mainly due to the stretched gasket I had to use. I refinished the case and bracelet to bring it back to a usable condition. Like all of the front pusher Seiko’s I absolutely love them.
The case finishing really does bring this one back to life. What I really need to do is mirror polish the centre links on the bracelet as this is how it would have left the factory . I now want to also find the more rarer lemon face version.