Registration slip Rabaul (Roman type) with overprint G. R. I. 3 d. And 5 penny \"imperial yacht\" with overprint G. R. I. 1 d, as well Marshall Islands 10 penny \"imperial yacht\" with overprint G. R. I. 2 d, together on faultless letter piece, tied by oval cancel \"RABAUL\", attest Peter Holcombe, Michel 320,-