1944. Registered Great Britain postal stationery envelope 3d green addressed to Egypt cancelled by 'Poczta Polowa 131' skeleton with framed hand-struck 'R/Poczta Polowa 131' with circular bilingual 'Examined by Censor/52' in violet and ‘Polish Army Unit 104' transit on reverse with arrival 'Base Post Office' date stamp with 'Deputy Chief Field Censor' censor cachet and Alexandria arrival. Rare item from Polish Military Unit 131 in Mozambique.