Remarkably fragrant and youthful for 50+ years. While obviously recorked the capsule seems authentic.
Who knows about the wine, maybe topped off with new wine?
Sadly I don’t recall where this bottle came from.
a long lived vintage so could be all 66 but the condition of the cork probably means a blend.
Cork came from Marin and at best this wine had been topped off at the time of recorking.
From good bottles this is a pretty vibrant wine in my experience so your bottle doesn’t sound like an outlier.