Circa 1930's cast iron Wyre door knob manufactured by Sager.  2 3/8" diameter.  Chicago style attachment mechanism.  Offered as found and uncleaned.  Some paint slop.  See images.  Additional pictures and measurements available upon request.  Please ask all questions prior to bidding. All sales final.  No returns accepted at this time.  Please check my other listings for additional unique offerings.  I will be uploaded a lot of antique hardware over the next couple weeks.