The Blockey that I had was a fiberglass hull with timber deck. The hulls were really thick and that showed up in the weight.
I have no idea how many he made, but mine had a plate inside the port hull (rear hatch) that showed he was still in Chapel St when it was made. Number 197 probably meant it was made in the early 70's.
I ripped out the Starboard main beam (loose dolphin striker) and it was super easy to fix with resin and chopped mat.