Joe Henderson Quartet Part (1 of 8) 1977

I'm not sure about date - but looking at Mike Hyman (drums) who was 13 in 1967 when Joe signed with Milestone in San Francisco I think 1977 is right (anyway that's the information that was given to me). It was filmed by Swiss-Italian TV company andf later shown (in the 90's I believe) by the French TV channel Messo. So this looks like it's a tour date - Anyone got any more reliable info? Anyway here's the line-up: Steve Erquiaga - guitar; Ratzo Harris - bass; Mike Hyman - drums.( I believe these three guys were active in the Bay area around this time too.)