Incoming cover from Australia franked with 1976 20c and 35c 'Cocos Keeling Islands' issue (SG 25 & 28) tied by NORTHAMPTON WA cds dated 3 JUL 1979 and also a Hutt River Province 55c 'Christmas' local on reverse tied by large HUTT RIVER PROVINCE cds dated 2 JUL 1979. Addressed to 'R E Allen, Banco de Londres, Managua' and held due to the revolution with fine strike of two line 'CORREO ATRASADO POR LA GUERRA' (mail delayed by war) marking in purple with boxed TELCOR MANAGUA arrival mark on reverse dated 30 AUG 1979. Cover has a boxed Banco de Londres receiving mark on front dated 3 SEP 1979. An unusual item. This cover was featured in an article in Nicaro vol.6 no.1 Jan 2017, a copy of which accompanies.