Rabaul, WWII Japanese Barge Tunnel (Papua New Guinea)
As of this writing, the scene pictured on this card is not overly commercialised or developed — but that may change before too long. Unused card from Post PNG, with this in the stamp area: “Domestic Postage Paid Papua New Guinea – Additional Postage required if sending overseas”. We’re also guessing there is not a lot of domestic postcard traffic in PNG. Grade: 1