• This vintage bank deposit-type bag dates from between 1943 and 1961 based upon the address on the front.
• It reads: "From National Association of Real Estate Boards, 22 West Monroe St., Chicago 3, Illinois, Return Postage Guaranteed".
• Faint ink handwriting on front of bag. 
• Drawstring closure. 
• Feels like tightly woven cotton.
• Measures  4 1/8" w. x 5 3/4" h.
• Found in family things.