I came across this photo on one of the Altec groups on facebook and thought I would share it here as it is a pretty cool photo. It is a Jimi Hendrix show at Royal Albert Hall. I would probably say around 68' or 69' not sure though. It looks like some Vott's with 511's inside cabinet and some 805 Multicells on top with 290 Giant Voice drivers.

54096050449 dbc611f7e0 b464631823_10228189440853593_3732164646618794450_n by Altec Best, on Flickr