Need to ask about a lot?

SOUTH WEST AFRICA - 1941-43 & 1943-44 WAR EFFORT ISSUES a good semi-specialised collection written up on pages, with numerous varieties often with positional blocks, note 1941-43 sets mint and used in units, 3d cigarette flaw mint and used within pairs, 1943-44 sets of units mint and used, 1s bursting shell (2) and smoking 'L' mint, covers etc. (approx 420 stamps and 5 covers)