Germany. (British Army Post Office). 1921. Registered envelope addressed to Hastings bearing Great Britain SG 360, 1d carmine (block of four) tied by Army Post Office G.R. double ring '11th March 21' with 'A.P.O. G.R.' registration label and oval 'Armamments Sub-Commission/ Military Inter-Allied Com of Control/ Westphalian/ Dusseldorf' on face in violet routed via Army Post Office/ S. 40' with receiver on reverse. Very attractive and scarce item of registered mail.