Sometime during 1973
Billy Cobham
People involved
Ray Barretto (cng); Tommy Bolin (gtr); Ron Carter (bss); Billy Cobham (prc); Joe Farrell (flt/sxp); Jam Hammer (pno/snt); Jimmy Owens (fhr); Lee Sklar (bss); John Tropea (gtr).
Bolin went to New York to participate in the recordings of a would-be solo album by Jeremy Steig. During demo recordings for this album, Cobham heard Bolin and offered him a job on his forthcoming album. Bolin guests on all but two tracks. The ultimate jazz-rock fusion album!
Albums & singles
Stratus Part 1 (mono)/Stratus Part 2 (stereo) [promo] : US 1973? Atlantic 45-2998
Spectrum [lp] : US Oct 1973 Atlantic K 40506
Spectrum [cd] : US/Europe

Material from above appears on...
Tommy Bolin - The Ultimate... [3lp] : Germany 1989 Geffen 924248-1
Tommy Bolin - The Ultimate... [2cd] : US 1989 Geffen 2-24248
From The Archives Vol. 2 [cd] : US 1997 Tommy Bolin Archives TBACD 7