General postal service ( 3. Planned trip), inner envelope the 1. Weight step franked with 20 penny, submersible stamp from 16.1.17, censorship stamp" double beam", large" return" stamp, reverse two reimbursement cancel from Bremen ( L 1 ) and type 1 ( L 4 ), perfect unusual and in this kind extremely rare, perhaps unique. Letter in perfect condition, very rare destination Dominican Republic, Michel / Geissler 600,- ++ ++ ;