1942 and 1944, army postal service official letter with cancellation adjusted stamp from 3.6.42 as well with service- and cover stamp army postal service no. M 14891 and army postal service official letter with mute machinery stamp from 6.6.44 as well with service- and cover stamp army postal service no. M 14891 = destroyer "Z 15" "Erich Steinbrinck", good condition