Information:
One of the (at least) four similar leather suits Elvis wore during his 1974 August/September Las Vegas engagement. Apparently, these type of outfits were very popular among performers at that time, so that may be one of the reasons why also Elvis decided to try out this type of suits
This suit could also be considered as very rare. A few pictures of Elvis wearing it on-stage, as well as backstage (during his '74 Sept/Oct tour) has surfaced. Also some decent quality Vegas footage is floating around.