unused 1c Rose X die (RN-X1), imprinted on back of bottom half of $2.00 four-portion 'CCC & St.L' Railroad Pullman ticket for an 'Upper Berth' (agent's and company's stubs, auditor's and passenger's checks), style 6, printed in Black on white and yellow, fresh, illustrated in Castenholz, few very faint minor toning spots on reverse only, otherwise very fine, very few recorded, an exceptional rarity, Scott retail ($500.00), Castenholz $900.00 photo est.