I have a Wakmann chronograph which my father bought for himself in the 1960s. I've just kept it in a drawer, since it has tremendous sentimental value, as he passed away many years ago. I've recently thought about reconditioning this watch and wearing it on occasion. I don't know if parts are still available and how involved a process it would be. The watch crystal is quite scratched and the pushers are missing but the watch does run. Any suggestions for how to proceed with this project?