Up until 1954, the Watch Tower Society said that the symbolism of the Memorial Loaf included the “little flock” and that the wine represented their sharing in Jesus’ death. (One example: “The loaf pictures not Jesus’ fleshly body but his body members, the Christian congregation.” The Watchtower, March 15, 1954, page 174)
I am not aware of a relevant statement in any 1955 Watchtower.
In the following year, The Watchtower announced a complete reversal: “The one unleavened loaf does not symbolize this ‘one body’ under Jesus. That loaf symbolizes the human body that Jesus sacrificed.” (The Watchtower, January 15, 1956, page 56). That particular article makes a several similar statements.
For some reason, the Watch Tower Society recently felt it necessary to acknowledge they had made this change: “At one time, God’s servants felt that … the bread meant “the body of the Christ,” the congregation of anointed ones. In time, however, it was appreciated that both reason and Scripture indicate that the bread represents Jesus’ human body. … Thus, at the Lord’s Evening Meal, the bread represents that physical body in which Jesus ‘bore our sins’.” (The Watchtower, December 15, 2013, page 25)
Doug