G-S Flexo CMY148 Watch Crystal for Gruen 285/608

This is a vintage G-S Flexo cylinder watch crystal, specifically made for Gruen models 285/608. It's a genuine replacement part in its original paper envelope, measuring 13.7 by 11.3 mm. These are great to have on hand if you're restoring an old Gruen timepiece and want to keep it authentic. New old stock, so it's never been used.