Perspex as dial glass replacement material

[Yorkie]

I think that it would be nigh on impossible to do this well in glass without breaking it.

Regards

Rob

It would for you or I Rob, but not for a glazier. It's just an oblong piece of glass with two holes - presumably about 10 - 15mm drilled in it. (Whatever the dial is to be made of, presumably you intend to make and apply a waterslide transfer to it on the underside). If you've got an old cracked or broken dial as a pattern for the size and gauge, it would be worth taking it to a local glazier for a price. They do far more demanding things than that - drilling holes in large mirrors, plate glass shop windows and display cabinets, and so forth.