This cover fetched a good price at £97.45. As a franking it is not much to write home about, but because it is going to Orange Free State in Africa, it is much more sought after, possibly moreso by collectors of Orange Free State postal history as an example of incoming mail. This example shows the 4d rate to Africa plus 2d registration fee.
Printed advertising covers are collectable in their own right. This attractive one is advertising Malloch Fishing Tackle in Perth, and was sold for £79.94.