Official Seal - Typeset, blue. U.S. Postoffice Dept., Officially Sealed, Opened through mistake by…, label affixed over top of cover bearing 3¢ Washington-Franklin Coil tied by "Coldwater Ohio Jun. 28" duplex to Delmar Del., purple "Missent to Smyrna, Del." handstamps, opened roughly at left, some trivial edgewear affects stampVERY FINE. THE UNIQUE EXAMPLE OF THIS POST OFFICE SEAL. ONE OF THE KEYS TO A COMPLETE COLLECTION OF TYPESET SEALS.This cover also has significance for the Washington-Franklin specialist. Scott No. LOX29  Estimate $1,500 - 2,000. $0 (Image)