SUC A 191 Watch Crystal for Gruen

This is a vintage SUC watch crystal, specifically the A 191 model designed for Gruen watches. It's a square acrylic crystal measuring 21.8mm by 21.8mm. It's still in its original paper packaging, which has some age-related wear, but the crystal itself is a great find for a restoration project. Perfect if you're looking to bring an old Gruen back to life with an authentic period-correct part. New old stock.