cover A vertical pair, in combination with First Tientsin provisional vertical pair with violet crayon lines (steep overprint) and German China steep overprint 25pf. on 1900 (31 Dec.) "Diercking" envelope registered to Shanghai, all tied by "TSINGTAU/KIAUTSCHOU" c.d.s. and showing Shanghai registration label at lower left. A major rarity and a wonderful exhibition item. Bothe, Mansfeld and Pröschold guarantees. Dr. Steuer certificate (1987). M. 1IIb, 2, V5II. Photo in colour