According to the labels, Cliff produced the reported hybrids roughly 10 years ago. “Hokkaido” was the presumed male parent, so technically I should have written DV x Hokkaido. We have no way of knowing whether your 20-year old Hokkaido and Cliff’s 10-year old Hokkaido are the same variety.
I’d be interested to know who else has Hokkaido other than you, Cliff and Bass.