"The envelope says produced in Australia by John Sands. On the poster itself, it says John Sands Leisure, transfer sheets manufactured in Italy by Action Transfers. No mention whatsoever of Letraset or Thomas Salter anywhere. The only date I can see relates to 1981-82 being his testimonial year. Cheers - tom1601beer"
"Action Transfer Products" was a short-lived company, owned by Thomas Salter, formed after the purchase of Letraset by Esselte in late 1981. Here they are continuing to use the "LP" serial numbers usually reserved for promotions such as this one.
Picture Credit: The SPLAT Scan Archives — B27 — tom1601beer
© Tom Vinelott 2023