As described in the Detailed History, the custom-carved wooden Empire pieces and the cabinet to hold them were created in the summer of 1962 by J.D. Eveland.
One notable feature shown here are the stock certificates. Although corporations were an element of the game as created in 1960, and at least through 1964, by the time the rules were written down (1969-76), they were not included.
The identities of some of the wooden pieces are obvious (tanks, artillery). The large cube with a smaller cube attached on top is a construction machine. The others are awaiting identification from an avid former Empire player.