I found that Spectrum 2000 picture the other day at
abcdvdvideo.myshopify.com, but didn't get around to posting it. They date it at 1967. Strangely, it never appears in the CDs (and neither does It's Boss). Here are the listings for 8433 Sunset Boulevard from 1967 to 1973. Note that Ciro's is included even when The Comedy Store first appears in 1973:
1967
Ciros
The Store
1968
Sennes F Enterprises
Ciros
Living Room The
Store The
1969
Sennes F Enterprises
Ciros
Frasen Corp
Living Room The
Store The
1973
Sennes Frank Jr
Ciro's
Comedy Store The
Below is a video dated as both 1967 and 1968. You can see the Spectrum 2000 sign in color at about 42 seconds in. Just before the band at the end, the sign for the recently discussed Haunted House on Hollywood Boulevard can be seen.
• Video Link