General postal service ( 3. Planned trip), inner envelope the 1. Weight step franked with 20 penny, submersible stamp from 30.1.17, censorship stamp Q, large\" return\" stamp, on face reimbursement cancel ( L 1 ) from Bremen, same stamp on the back and reimbursement cancel ( L 4 ), type 1 from Bremen, in so far unknown green colour, apart from one vertical fold in perfect condition, very rare destination Puerto Rico, Michel / Geissler 925.-+plus