Here are the details from the Randall Firearms history, link in first post. The write-up says it was a set... sets were usually composed of a left hand and a right hand model, but in this case the write up is confusing and the "set" may refer to the three common slide variations. It would be interesting to see this/these things.
From the history write-up...
"B321 Set ? This set was based on the left-handed LeMay, and it was the only set to have all three individual slide variations fitted to a single receiver. The receiver and all three slides were identically engraved in a high relief pattern by Byron Burgess. The set was mirror-polished and was fitted with custom ivory grips bearing scrimshanded Randall logo on each side. Scrimshaw work was done by Mark Tate and all custom work by the Hal Jankofsky at the RFMC Custom Shop. The set was delivered in a custom-fitted walnut presentation case. It has the serial number of REK 1."