[jad22]

The Celtics picture packs started being issued during the 1955-56 season. There were photos distributed during the 1954-55 season, but they were not issued like the picture pack sets were. So, it is possible to find a random Bob Cousy, Bill Sharman, Fred Scolari, and Frank Ramsey (did not play during the 1955-56 season so he does not appear in the 1955-56 set). These have smaller dimensions than the picture pack photos. The 1955-56 set consisted of 10 photos:

Ernie Barrett
Bob Cousy
Dick Hemric
Jim Loscutoff
Ed Macauley
Red Morrison
Jack Nichols
Togo Palazzi
Arnie Risen
Bill Sharman

The 1956-57 had at least 11 players (not sure about Togo Palazzi appearing). The 1956-57 consisted of:

Bob Cousy
Tommy Heinsohn
Dick Hemric
Jim Loscutoff
Jack Nichols
Andy Phillip
Frank Ramsey
Arnie Risen
Bill Russell
Bill Sharman
Lou Tsioropoulos

The 1957-58 had 11 players and is unique due to having a bluish tint on the photographs. None of the other picture pack years look like the 1957-58, so they are easy to date.

The 1957-58 set consisted of:

Bob Cousy
Tommy Heinsohn
Sam Jones
Jim Loscutoff
Jack Nichols
Andy Phillip
Frank Ramsey
Arnie Risen
Bill Russell
Bill Sharman
Lou Tsioropoulos

If anyone has any other useful information please feel free to share. Here is the 1955-56 set.