Mackin, M.T. - The Gold Coast - The Post Offices/Agencies and their Cancellations 1875-1957Publisher: West Africa Study Circle, 1990.
Second (revised & enlarged) edition, large (A4) paperback, illustrated, 172 pages, slight corner-creasing to the covers, minor dusty marks to the page-edges, internally clean, in Good condition.
Comprehensive classification of Gold Coast cancellations, with types, earliest and latest dates, etc. Very well illustrated.