Cape of Good Hope 1904 Rare Blinkwater Double Arc on Letter

1904 BLINKWATER to Grahamstown: Wonderful cover franked KEVII 1d tied by large Trianglular defacer with alongside rare Blinkwater Double Arc datestamp AP 21. Postmarks full & crisp and on reverse the transit (Fort Beaufort) & arrival marks. This post office (town population of 1200 in 1904) was opened in 1859 & the cancellers shown are the only implements allocated to Blinkwater. Superb.