Mr. Tung's Pole beans
I did a search, couldn't find a thread specifically on them so I'll do a little update here.
In a nutshell this bean was brought to Canada over 100 years ago by a Chinese immigrant, Mr Tung. This is another bean that would have been lost if it wasn't for seed savers.
I just thought it was worth mentioning that although they have to be stringed, they can be eaten as a full bean, pods are tender and flavorful, or at least I think so. I've only eaten them as snap beans in the past.
These actually got away on me so before I designated them for seed I thought I would steam a couple and see if they were still edible at this stage, yes they are :).