Identifying / Valuing a bulova Astronaut
I recently found my father's old Bulova Astronaut.
First, I'd like a positive ID on this watch. The number suggests 1967 manufacture but can't figure out the serial number. Where can I find more information on this watch?
Second, the crystal is pretty scratched up. What would be the value of this watch and is it worth getting it repaired / cleaned up? The battery is the old Rayovac but I don't think they make it anymore. What is the best replacement battery?
Finally, Where can I get it repaired and reconditioned, with a new crystal? Is this even do-able anymore and is it worth it to try?
Pictures attached... Well, it won't seem to allow me to upload the pictures. So, the numbers on the back are M7, and C35906. It's a Bulova Accutron Astronaut. Any help is greatly appreciated.