Norway philatelic perfin: 001. "B 90" (Bergen 90). NK 1061 (pos.8). Stamp on envelope with logo from the exhibition lower left corner. Flap is missing. From Booklet FH 73, left stamp of horisontal se-tenant pair (885 booklets sold). Used from 1989.02.13 to 1991.05.21). National exhibition arranged by Bergen Filatelist-klub.