A First War German "Hindenburg" Matchbox Cover

Silvered metal, magnetic, front panel illustrating Paul von Hindenburg and inscribed "UNSER HINDENBURG" (Our Hindenburg) below, back panel illustrating an Iron Cross with bursts of oak leaves and acorns, inscribed "GOTT SCHÜTZE DICH" (God Bless You) above and "AUF WIEDERSEHN" (Good-Bye) below, with clusters on oak leaves and acorns in all four corners, slotted on the spine, voided side panel, 41.5 mm x 62.8 mm x 20.5 mm, extremely fin