The proper varietal name for this heirloom might never be discovered, but its an awesome grape. We believe its a V. labrusca x vinifera hybrid after speaking with Patrick Connor (University of Georgia) in 2014 and sending him plenty of photos of fruits, leaves and seeds.
What we do know is that is a great multipurpose grape for the table, preserves, juice and wine. The fellow we sent the juice to tested the Brix and said the juice alone would give an 8% wine. The fruits are slipskin, seeded, ripen in Sept and are borne in abundance. Fully hardy and productive in Vancouver and at my late beekeeper mentor at his seaside acreage in Union Bay, but fails to produce in Cumberland due to mid-late May frost.