Boyd c406

Two hole saws, two three-speed bicycle hub ball rings, eight flooring nails, four steel wedges, six machine screws, nine nuts, two lag bolts, bicycle coaster brake hub body, bicycle axle, two bicycle stem wedge bolts, two three-speed bicycle hub pawls, four ball bearings, copper, bronze

3 lbs, 9.7 oz.
12.5 x 5.5 x 3″

Boyd has a one-minute video of his birthday: