Vintage Western Electric Return Key Tag:  Front has "100" in center with dates 1869 and 1969 to the left and right and "WESTERN ELECTRIC CENTURY OF PROGRESS" encircling; Reverse has "39599" in center with "IF FOUND DROP IN ANY MAILBOX RETURN POSTAGE GUARANTEED" and "WESTERN ELECTRIC 195 BROADWAY ROOM 1626 NY, NY 10007"; has hole at top for attaching. measures approx 1-1/4" diameter, in good shape however there is tarnish evident (see pic's).