merwin61 - It was not bolted together so I think the head weighs about 45 to 50 lbs and the treadle unit about the same maybe a hair less but awkward to move by yourself.
Not having seen a 29- in the wild since childhood, when we got one pair of shoes a year and resoled and reheeled them at the cobbler, they aren't as big as a little boy imagined. But, as you said, it is heavy. Much heavier than I expected, especially the treadle part. My head was bolted to the base with 3 flat headed slotted bolts (screws) and one round headed. The round headed looked original, the three flat heads were shiny indicating not original. Hopefully, CD or SteveH or someone will get back with size for you. If not, I'll eventually get them figured out and post it. It appears to be a 1/4 inch 3/4 inch long bolt with a standard medium thread.