PNG set of 4 - 1950s/60s ‘SPECIMEN’ overprints unused just $A99! - These are RARE. Never buyable from the PO there, and only obtainable in the TERRITORIES Specimen pack that sold incredibly poorly - oddly - only a few 100 were ever sold in this era. Hence the high SG cat of £180=$A360. I see these once each few years even here. 1952 10/- and £1 - now over 70 years old and the very scarce 1963 10/- Rabaul, and the £1 QE2. Fresh, flat, bright, fault free, ungummed unused, from a lovely old collection I bought today, and 4 stamps that are missing from near EVERY collection of PNG. All at less than the current PO Annual book costs! Just $US64 at $A99 – Stock 416BZ
https://stampboards.com/viewtopic.php?t=97479