Information:
There were two 'identical' versions made of this suit, with only one minor difference ... the 'trim' on the v-shaped opening/collar was different colour on both suits; the other version had blue/silver, while the other was basically orange (see pictures below)
Although this suit is mostly associated with the 1970 January/February Vegas engagement, it was also used during one of the 1970 Astrodome gigs, and again during the August/September Las Vegas stand. It's even possible that Elvis wore it during his first 1971 Vegas engagement.