Sweden. Military postal stationary Facit 1, 9 , Proof for M2 by Oskarshamns Printing Works 1930 with plate for the reply stamp from the M1 issue in blue colour in letterpress (boktryck). Only four known in this colour according to the handbook for Swedish Military letters with reply stamp (ISBN 91 85702.33 1). Excellent quality. Eyecatching showpiece!