British Solomon Islands: 1971 under-paid incoming airletter from Rabaul, PNG to Guadalcanal franked with PNG 7c. 'T' in circle postage due mark added on arrival, with a BSI 6c stamp apparently used for the postage due. Honiara transit mark on the back (scan 2). Airletter flap toned otherwise good condition; unusual usage.

POSTAGE FOR THIS ITEM: (uninsured): UK first class £1.80, second class £1.00, Europe & overseas £4.00. Packages with total value over about £50 need to be insured, except by prior agreement. Benefit from free postage for any additional items in the same package, subject to weight and maximum value. A certificate of posting will always be obtained by me for every package posted. I always try to use obsolete commemorative or definitive stamps when I can, but please note this is not usually possible for registered mail. For anything other than low-weight unregistered postage, particularly multiple purchases, please request a combined invoice from me before making payment.