British East Africa. (Tanganyika). 1934. Postal stationery envelope 'fifteen cent' red cancelled by Moshi double ring, addressed to Nairobi, underpaid with circular 'T' hand-stamp and hand-struck 'T/To Pay 10 Cts Cents/ Insufficiently Prepaid' on face in violet with Kenya postage due SG D2, 10c vermilion tied on arrival by Nairobi receiver. Nice item of postage due mail.