Nice one, Archey. We don't see too many Frontiers series low numbers. I don't think I have a single one.
I wonder how that slipped through QA? And there has to be at least a two sheets of them - Since it's BABN, the sheet format is 5 x 8 (if memory serves) so there's the first 40 and then the next forty were 46 would be. So that note would be top row, second from the left. Does that make sense?
No, I believe it would be top-left on the 46th sheet as they are skip numbered. Low numbered error is a great find though.