G-S Flexo T303-10 Watch Crystal for Longines Bryn Mawr

This is a vintage G-S Flexo watch crystal, specifically made for the Longines 'Bryn Mawr' model. It's still in its original paper packaging, which is a nice find for anyone doing a restoration. The crystal measures 11.7 by 10.9 mm and is part of the T-series. It's a genuine replacement part that's been tucked away for a while, so it's in great shape for its age.