Aloha Matt,
OK I digged deep into my researched and I can confirm that the photos on your link is indeed John "Pop's" Achoy.

And theses photos taken by James Davies in the 80's are of him and I have proof to back it up. You see Mr. Achoy & his youngest son Mike walked in to our store at Pacific Rad Sport in Waipio and introduced himself. Eddie the owner was in shock that Mr. Achoy wanted to meet Eddie and visit his store after hearing so much about this place and all that PRS does to prompt the sport. I myself have not met him, but I did meet Mike and he give me the history behind SUP. He told me that the reason he used a hard hat was to keep his cigarettes dry and in between sets he would light one up.....Classic!!! So what Eddie did in appreciation to Mr. Achoy and for ALL he did to set the history of SUP..........Eddie gave him an SUP board.
Sorry this is not the board that Eddie gave him, but it's something similar to it. The board is 11'-6" stinger, rounded nose, and green. We are so honored to be endorsed by the Achoy family it seem to be a dream for Pacific Rad Sports.
We got some pics from the Mr. Achoy that shows the same hat & the same color knee pads....And I believe that it was taken it the 80's & 90's...........You know I wouldn't be surprised if it was taken by the same photographer (James Davies)........the shots are so similar! Check out the slide show.......Looks almost the same.
Thank-you Sam - the guy that took the photo in 1980, James Davis, is heading to Hawaii this winter - it would be great fun to hook him up with someone from the Achoy family to present the photo..
From what I here Mr. Achoy has not been felling well, but I may be able to get in touch with Mike so you guys can hook up.
We would like to thank the Achoy Family for providing PRS with the photos that we all can enjoy.....

Aloha........Sam