Thanks for the tasting note, Patrick!
Adam Frisch of Sabelli-Frisch stated in this thread post that the “Knowles Vineyard’s” Syrah vines were planted on their own roots in 1964:
"… It was smuggled in from Australian Shiraz clippings by a prominent local wine family and was, as far as I know, the first Syrah planting in the region (and probably one of the earlier ones in CA). Mokelumne River AVA has a lot of sandy soil, so own rooted vines tend to survive better there. Fields Family Wines used to make from the same vineyard, but called it the ‘Postage Stamp Vineyard’. It only produces 25 to 50 cases a year. Here’s a little video link on Instagram I made of it recently: