Check the listing for details. WWI BRITISH P1902 WOOL SERVICE DRESS COMBAT FIELD TROUSERS- SMALL 32 WAIST. Condition: New. Listed at 159.96 USD. WWI BRITISH P1902 WOOL SERVICE DRESS COMBAT FIELD TROUSERS-. Serge Wool Fabric. he 1902 Pattern Service Dress tunic was the standard uniform clothing used by the British Army. The 1902 SD uniform was worn by the English, Welsh.