This set is generally circulated as 9/14/67 but that date can't be right. Jim Murrary was gone by 8/18/67, according to Faren Miller's Quicksilver Diaries, which are available on the Cipollina Yahoo group. The assumption is a September 1966 Fillmore date, 9/4/66. Possible further confirmation of the year is that the recording is mono, whereas the great Feb. 1967 Quicksilver Fillmore West soundboards are stereo.
As for the recording quality, it's pretty good soundboard. However, the vocals are too loud compared to the guitars.
The other two are included here as bonus tracks. All Night Worker is a similar recording to the "Live in San Jose" September 1966 version, but it's different. Pride of Man, judging from the applause at the beginning, may be a TV broadcast.
Soundbaord -> ? -> cassette
tracks 01-08: first set
tracks 08-14: second set
tracks 15-16: bonus tracks