Los-Nr. 527

5 m. on 1 pia. ultramarine, 2nd printing, control plate block of six, transfer B, vertical ribbing on pos. 85-86 and crosswise ribbing on pos. 97-98 and 109-110, also 'open 5' variety on pos. 97, unused o.g., most stamps unmounted mint, certificate Kaufmann (Bale 4d/f)