Hard to find New old stock Hamilton glass crystal for a Gruen Curvex Batwing 440-641 model watch. A little dusty from sitting around for decades, but no chips or scratches and will clean up perfect.

May be a different manufacturer than the one pictured.

Ask questions.

I have many Gruen and other brand crystals, so if I don't have the model listed on eBay, please send me a message with what model you are looking for and I'll let you know if I have it.