Lot 143
143
unmounted mint Block of Four 20c Inventors, black color omitted (2058b), mint R. margin block of four, a very spectacular and dramatic error, never hinged, very fine, Datz notes 200+ blocks of four reported, Scott retail $400.00 photo
unmounted mint Block of Four 20c Inventors, black color omitted (2058b), mint R. margin block of four, a very spectacular and dramatic error, never hinged, very fine, Datz notes 200+ blocks of four reported, Scott retail $400.00 photo

Details
unmounted mint Block of Four 20c Inventors, black color omitted (2058b), mint R. margin block of four, a very spectacular and dramatic error, never hinged, very fine, Datz notes 200+ blocks of four reported, Scott retail $400.00 photo