Roger,
It simply doesn't mean anything. The vast majority of small "vintage" prints were simply Press prints that were sent to magazines and newspapers and never returned.
As for HCB. There was a dedicated printer for HCB at Picto Bastille. His only job was to go to the vault, take a neg and print. Being there many times myself in the dark for my shows. I can assure you he was not making small prints. Printing the same negs for what 30+ years ? He could do it eyes closed