Capture courtesy of Beatles on Videos - Bamiyan dated his screen-captures as "January?" but agrees that it coud be anytime early 1967.
I agree - judgung by Ringo`s fully developed moustache it is probably not late 1966. John`s moustache looks quite short.
It seems John has cut his moustache back by and by, a bit between 10. and 19. February, again before March 3, again some time before the release party and then completly off.
I think this is March or later. Any ideas?