Home Products 1508500 United States (Scott 1089). 3c Architects Plate Block. Mellone #25. FDC.
1508500 United States Covers (Scott 1089)

1508500 United States (Scott 1089). 3c Architects Plate Block. Mellone #25. FDC.

9573.
3c Architects Plate Block.  Mellone #25.  FDC.
 
3c Architects Plate Block.  Mellone #25, 1st American Architects' Association cachet in brown and black.  Unaddressed with insert.
Very Fine