This is a great set of used position blocks of Canal Zone 137, the 1 1/2c Magoon issue from 1948, all with light or neat cancels including Albrook Air Force Base and Diablo Heights, and most F/VF (a couple are F only). Includes 7 half arrow blocks and a plate block. Only one stamp (lower right stamp on the upper left corner block) has a small bend, otherwise no faults. Great for the specialist or exhibitor of CZ 137s. Will be removed from the album page and sent unmounted. A fantastic addition to a specialist Canal Zone collection.