My parents were on a camping trip when they met a couple named Boothby from the town of Livermore. In the course of visiting they happened to mention me and my seed project (not sure why, but parents are like that).
Boothby commented that they had an old cucumber variety that had been in his family for at least five generations and had never been in the marketplace. They shared some seed with my parents and so it became art of my collection. After offering it for a few years it caught the notice of Pine Tree Seeds (in New Gloucester, a short way from Livermore) who trialed and offered it in their catalogue, its first commercial introduction. It has since been picked up by a number of seed companies, both in the US and UK., far from its original status as a rare endangered Maine family heirloom. Moreover, an improved (PM-res.) form has been bred and released.