Portland quarry in Ct. is hosting the annual Vintage hardhat gear dives in June on the 19th 20th 21st, certified divers get to try out some great history. I dove the MKV last year, and they have a BUNCH of other gear to try out as well. This year they tell me they will include some double hosers, and a fiew "surprises"....??? The folks putting it on are some of the nicest people I have ever met, and are thrilled to share thier treasures with others.