GS Flexo N265 Watch Crystal for Gruen Mermaid Portia Ethel

This is a vintage GS Flexo watch crystal, still in its original paper envelope. It's a replacement part specifically for Gruen watch models like the Mermaid, Portia, and Ethel. The dimensions are 12.6mm by 12.2mm. It's a great find if you're restoring an old Gruen timepiece and need an authentic period-correct crystal. New old stock.