East German Dark Blue Female Service Trousers MdIThese are East German dark blue service uniform trousers for females. The dark blue uniforms were worn by Transportation Police and Fire Protection Services. Most are marked MdI, but some are not marked. MdI was the East German ministry of the interior and governed the police forces and fire service. There are 2 variations to choose from. Front or side zipper fly. Both versions are made from a wool polyester blend fabric and feature slash pockets.