Bubbleboy crystal for Sumo
Those of you who frequent other watch forums, like SCWF, or have looked into modding your watches with a super dome will have come across him. He's highly recommended on other forums.
Let me know, if you want a crystal from the man. He grinds them out of tempered mineral glass, similar to Hardlex.
The going rate is approximately US$40/crystal and you'll need to provide:
a) Seiko part number
b) and thickness
All we're gonna be saving is combined shipping and MAYBE a few dollars off a combined order. And I'm just facilitating this coz it took me a while to hunt down this resource for myself and I figured there'd be others who'd be interested.
Let me know through PM, send me your email address and we'll take it from there.
Happy collecting, y'all!