Well, I started down one rabbit hole, when I realized VFG doesn't have the black label for Rudi Gernreich. Including that here, from what I can tell from the few other listings I've seen with this label, seems to be late 60s. My piece is timeless - like it wouldn't surprise me if it were 50s, or 90s. But, the lining is silk, beautifully tailored woven large scale wool herringbone. The jacket is beautiful, but classically tame - not an off-the-wall Gernreich design. The rabbit hole I went down is the other label - the shop label "Gene Shacove Beverly Hills" - - - Gene Shacove is who the Warren Beatty character of "Shampoo" was based on, a celebrity hair stylist and man about town in the swinging 60s-70s (probably until he passed in 2001). I could not find anything about him having a shop for clothing - his hair salon was famous. So, further research is needed. But wanted to connect these two labels (I found one other example of a Gernreich labeled for sale at Gene Shacove, but it looks like the 70s white label).
Rudi label added to the LR 11/26/22
Gene label retrieved for the LR 11/26/22
Thanks, Sadie!