Cover posted 2 days early - probably deliberately as
there is at least one other similar cover with a block of 1/2d stamps.
Postmarked Banavie Invernessshire 8 May 37 with backstamp Fort William
10 May 37
Overprints
'M.E.F.' (Middle East Forces) from 1942 for use by
British Forces in occupied Eritrea (1942), Italian Somaliland (1942),
Tripolitania (1943), and the Dodecanese Islands (1945).
'Morocco Agencies - 10 centimos'
(Spanish Zone)
'Tangier'