G-S Watch Crystal CT303-11B for Gruen 275/904

This is a vintage G-S watch crystal, still in its original paper packaging. It's a CT303-11B model, specifically designed for Gruen 275/904 watch cases. The crystal measures 12.0 by 10.8 mm and features that classic 'C-Superb' shape. It's a great find if you're doing a restoration on an old Gruen and need an authentic replacement part. New old stock.