HOWTO make an irising wristwatch case

Instructables user Gogglerman made this beautiful mechanical irising case for a steampunky wristwatch movement, and posted hints for making your own. It's one of the sweetest projects I've ever seen, and definitely the coolest application of steampunk to horology I know about.

Steampunk wristwatch with mechamical iris cover. "TimEye".

(via Make)