Cover with Royal Signals Detachment, c/o 57 C.R.E. P.o.Box 102, Mackinnon Road, Kenya' manuscript return address on reverse franked with single 1948 20c orange 'Silver Wedding' issue (SG 157) tied by MACKINNON ROAD KENYA cds dated 15 DEC 1948 with fine strike of large ARMY SIGNALS MR cds dated 14 XII 1948 on front & reverse. Sent airmail to UK. Unusual use of this marking.