Yes and no.
I believe you have a stamp which was labeled a long time ago before the catalog numbers for the offset stamps reached their current configuration - and the original collector did not differentiate which sub-variety of 526 he had.
To explain further, at least through the Scott 1954 Specialized catalog types IV, V, VA, VI, and VII are all under 526 as sub-letters as shown here:

Sometime between 1955 and 1959, the offset issues were expanded to the major catalog numbers of 526-528B we have today. Your stamp appears to be a type VII, 528B, by the current numbering.