General postal service ( 3. Planned trip), with unusually and very rare franking denomination ( twice 2 1/2 penny+15 penny) provided letter the 1. Weight step as inner envelope to the USA, submersible stamp from 16.1.17, rare censorship stamp X and large\" return\" stamp, without reimbursement memo, faultless and very rare cover, Michel / Geissler approximate 575.-