1912: Registered Letter stationery envelope franked with 1910 3 d.
purple & yellow, used from Zungeru to Colchester, England, dated
1912: Registered Letter stationery envelope franked with 1910 3 d.
purple & yellow, used from Zungeru to Colchester, England, dated 24
February 1912, tied by the double ring "ZUNGERU N N" in black, with
a "REGISTERED PLYMOUTH" oval dated 19 March 1912 and "COLOCHESTER"
arrival cds alongside dated 20 March 1912. Zungeru registration
label No. 351. Rare example. Note: Northern Nigeria did not issue
any postal stationery. Formula registered envelopes are known used.
This and one other example were featured in an article in Cameo.
Reference: Cameo, Volume 13, Number 1, January 20112, pg. 8-9,
'Formula Registered Envelopes'. Illustrated in 'The Postal
Stationery of Nigeria', by Peter Hørlyck, pg. 60
