16750 Crystal Replacement

[jban5]

My 1982 GMT 16750 had a service dial and hands put on it before I owned it. The watch came to me from a good friend who had to check out early so I've decided that I'm going to just enjoy it as it is but have thought about getting a acrylic dome and when I have it serviced next, or get the bug would replace the flat one with magnifier with the dome, everytime I see one I find it pleasing to look at.

So my question is, what is the correct one for my model? Is it the same Tropical 19 or is it different.

Thanks IA

Jeff