SG MS241a. 1978 Volcanic Rock Formations of Ascension .
Sheetlet of 10 stamps. "ASCENSION' (territory title) Omitted.
We first handled this major error back in 1993 of which just two examples are known, and at that time was sold to a private collector and remained in his collection until now. In our opinion one of the greatest modern British Commonwealth major errors! Post Office fresh Unmounted mint.