Information:
The "Egyptian" made it's debut during the 1974 June/July tour. After that, it wasn't worn again until October of 1976. It was worn several times from then on, including a few times in Vegas. The last time Elvis wore the suit was during the famous 1976 December tour (on December 29th, to be exact).
Only one belt was designed for the suit, but Elvis used it two different belt buckles (besides the original); in 1974, the belt had it's original buckle, but in 1976, it was used with the belt buckles from the "Chinese Dragon", and "Chief".