1c Green rotary, vertical pair imperforate horizontally (538a), used top sheet margin vertical pair, a gorgeous 'gem', magnificently centered within wide perfectly balanced margins, huge imperforate margins, fresh bright color on very fresh bright crisp paper, very light machine slogan cancellation,

1c Green rotary, vertical pair imperforate horizontally (538a), used top sheet margin vertical pair, a gorgeous 'gem', magnificently centered within wide perfectly balanced margins, huge imperforate margins, fresh bright color on very fresh bright crisp paper, very light machine slogan cancellation,

SUPERB, AN EXTRAORDINARY USED 'GEM' ERROR PAIR, DESTINED FOR THE INFORMED SPECIALIST, EXTREMELY RARE USED, Scott retail $100.00 (grossly undervalued)