I might have one coming off my Calculator I am restoring. Somebody must have put it on.... You got the Carrera measurements? Cheers
So sorry for the late reply. My e-mail alerts don't seem to be working. They didn't even go to my junk mail. I'm not using precision instruments but the diameter of the crystal measures 34mm across.
seen this mate? https://www.ebay.de/itm/Vintage-Heu...186223?hash=item1cd8d907af:g:46AAAOSwmrBdXDPiPurchases made through these links may earn this site a commission from the eBay Partner Network