FDC With Upside Down Picture On The Back

Hi everyone, I came across this open FDC envelope that seems not normal to me, the picture on the back if you fold it will be upside down.
Can someone tell me please if this is normal or not and possibly if is any value on it.

Thank you


*** Moved by Staff to a more appropriate forum. ***

Perfectly normal. All copies of that aerogram were made with the picture on the back in that orientation. Scott UC60.

Thank you

This is normal for aerograms in general. Great Britain has issued many commemorative aerograms (or aerogrammes, as it is spelled in the UK). The earlier ones, issued in pre-decimal times were printed in four panels, which required two folds at 90 degree angles to one another. The four panels were in a normal orientation to each other as printed, but when folded and sealed in preparation for mailing, the exposed back would be upside down relative to the front. Later ones issued in the decimal era have three panels, which also require two folds, but in the same plane, and also, when completely folded, the back is upside down relative to the front.