Synonym or cultivar number (also WE 71-817-89) for the grape variety Cabernet Dorio; see there.
The red grape variety (breeding number We 71-817-89) is a new breed between Blauer Limberger (Blaufränkisch) x Dornfelder according to DNA analyses published in 2012. The crossing of Dornfelder x Cabernet Sauvignon stated in the breeding list...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi