Lot
2702 
1923, 7¢ McKinley, horizontal pair & 8¢ Grant, tied by "Washington, D.C., May 1, 1923" First Day of Issue slogan machine cancel on registered return receipt cover to George Frost in Boston, Mass., return addressed to Philatelic Stamp Agency with additional manuscript notations, boxed registered handstamp and receiving backstamp; cover with central wax seal spot, otherwise Very Fine, a very rare first day combination with only a handful existing. Scott No. 559, 560 Estimate $500 - 750.
Realized: $475