1 Gr. on-custom postal stationary registered letter sealed carmine red, 5-foldly with K2 "OLDENBURG 4/1" and red carriage paid cancel buried " Oldenburg F.N1. 1-4-70 " to Heidelberg. The postage amounted to 11 groschen of which 10 groschen were paid in cash. One particularly of Oldenburg rare mixed franking between F cancel and postal stationary. Good overall condition.