Here is an old Seiko 5 Watch. The Model number on the back casing is: 703922-6319-8090. And inside: Japan 6319A . I think this watch is from the 1970's. So classed as vintage I suppose. It was one of my family members and hasn't been worn or used for years. It's been stored in a box for many years. Seiko make very good watches, many of them at affordable prices.
Okay, Seiko's are certainly not Rolex in terms of quality and precision, but they are still excellent watches for what they cost to buy. This one is a 21 Jewels automatic and is all original. It has a lot of scratches on the glass, and the wristband has seen better days. But guess what. After a little bit of shaking it has started working again.
I took the back off and it quickly became apparent that the automatic mechanism that rotates inside is quite stiff. A thorough clean, a good service, and I think this watch would run like clockwork - pardon the pun. I'm not sure if it would be waterproof to any reasonable level due to me opening it up and not having the right tool to close it as tight as it needs to be to stop water getting in and damaging the watch. Great watch though. A classic Seiko.