½ S black with clean thick four bar cancel tariff right on Locate-envelope, both front- as also reverse always clear strike of the mailbox oval postmark \"6. St. P. A. 26 / 8\" without further town cancel, a little shaded with inconspicuous corner tooth perforation crease, beyond that perfect and initially condition, abridged certificate with photo Mehlmann BPP \"a not frequent cancel combination from four stroke and mailbox cancel! \"