LSA 1917 U Broad Arrow cross out and FTR'ed 1944

[RobD]

I agree the crossed-out U-with-a-broad arrow is a form of an official sold-out-of-service stamp from South Africa.

In my limited experience the "correct" stamp (i.e. the U-with-a-diamond-in-it) is not too frequently encountered and I suspect it was usually not at hand when it was needed...

For interest, here is a Mk IV MH with two S Africa acceptance stamps, one S African sold-out-of-service stamp, and one Southern Rhodesia Government acceptance stamp.