Thankyou vasia, but what confuses me is the overprint on #246 has a single line between the upper text and the new denomination and no line below the denomination whereas the stamp I've shown has a double line between text and a single line below the denomination.
This overprint is shown on stamps starting at SC#282 (on postal savings stamps - different from mine), but mine doesn't seem to be listed with it. That I can see, anyway.
