Welcome to the forum @DrunknMunky I have seen a recommendation from other members on here that if the watch holds great sentimental value, take it to someone that is recognised for repair. Using it as the watch 'to start out on' may end up in tragedy.

Are you planning on cleaning the watch in the case? Normally in watch repair  two separate kinds of cleaning fluids used. The water-based fluids for cleaning the case the band the crystal etc. Then a separate solution for cleaning the watch movement which could even be a water-based cleaner but I don't ever recall anyone cleaning the case in the same solution? Okay I'll take it back I was thinking I do know an example of that? I remember now there was a shop that I worked at that for some reason he ended up with water-based watch cleaning solution which the owner refused to use. So we just mixed it up used to clean the bands the case etc. But the water-based solutions are definitely different than naptha I don't actually know what it would do to a crystal but it's not what we normally use.

Welcome to the forum @Geo5215. Whereabouts in WA? I used to live in Pinjarra.

Welcome ot the forum @Spanky

Welcome to the forum Tim. Enjoy. What are you working on?