New Guinea 1914 2s on 2m blue used on Travers cover, SG13New Guinea 1914 (Oct 13) cover to Mrs. R. J. A. Travers, Sydney from her husband Capt Travers, endorsed "On Active Service", franked by 1914 15 New Guinea 2s on 2m blue, 4mm space from setting I position 2, tied by very fine strike of RABAUL type 1 two line datestamp in violet, four days before the official date of issue (Oct 17), SG13. On the reverse there is a typed certificate, "I hereby certify that the stamp attached to this envelope is one of