1980 (02) 10p Left & Right Band Phosphor Definitive Issue - PO - Windsor Pictorial H/S - But with the Phosphor Coated Paper Error

Rarely seen Post Office cover for the 10p Left & Right Band Phosphor Definitive Issue.

Windsor Pictorial H/S.

But with the Phosphor Coated Paper Error on the RIGHT hand stamp - supposed to have a Right Hand Phosphor Band and instead it's on the Phosphor Coated paper...

A known error on this issue - Booth Cat £80...

Code: 63454