Always hard for me to believe a run of one, even if that is the official score. Who is to know, and do dies talk? I think not...The 1954 is a currency strike (vs. the 1952 as a proof). Evidently, the 1952 was a year of waste due to the King's death (the PREVIOUS year) and so there are the orphan bits in the penny, shilling and halfcrown denominations; was the final count really only one penny in proof, one halfcrown currency, one 2/6 in proof and "a couple" of shillings ? Well, that diverges. Regardless, I just don't see value beyond nominal of foil impressions & wish good luck to the buyer.