[Brub58 (Bruce)]

Several years ago I picked up two pieces of optical glass from the ASV with the view to making a refractor. However life got in the way and they've sat in the bottom drawer for about 6 or 7 years. I've pulled them out to start this project again, but no longer have any specs for them.

The makers name is faded but I think it says Chance Optical Glass - I can see the "Ch" and "e" and maybe a faint "an" in the middle. They are labelled EDF 42553 and BSC 38853. I also have two templates I made, one is 422mm radius and the other 598mm radius.

Would any ASVers out there happen to still have specifications for these glasses? Google seaches have yielded nothing on these numbers. I'd love to put them into OSLO and see what I can do with them rather than just using the templates.