It puzzles people at first because, really, who expects to see a New York Stock Exchange trading post outside of, say, the New York Stock Exchange trading floor?

Yet, here it stands in the Potenziani Family Atrium at the Mendoza College of Business — an antique hub that was the scene of frantic buying and selling from 1929 to 1981 until it was replaced. Now, this relic serves as a rare piece of financial history.

In celebration of the 20th year the post has stood in the atrium, please enjoy this interactive feature.

The 41 companies listed on the post’s horseshoe-shaped marquee were:

• AC American Can Co.
• ACJ American Chicle Co.
• AG ATL Gulf & W. Indies S.S. Lines
• ARU American Republics Corp.
• BF Booth Fisheries Co.
• CEZ Crown Zellerbach Corp.
• CFG Corn Products Refining Co.
• DO Dome Mines Limited
• DRU Drug Inc.
• EG Electric Storage Battery
• ENX Eaton Axle & Spring Co.
• FDS Federated Dept. Stores Inc.
• GI Gimbel Bros Inc.
• GL General Electric
• GUX The Grand Union Co.
• HRT Hartman Corp.
• HX Hudson & Manhattan R.R.
• KKN Kaufmann Dept. Stores Inc.
• MYR F.E. Myers & Bro. Co.
• NA North American Co.
• NAD National Distillers Prod. Corp.
• NCM National Acme Co.
• NNY Nunnally Co.
• PDF Panhandle Producing & Ref. Co.
• PDO Phelps Dodge Corp.
• PPX Pierce Petroleum Corp.
• PSS Peerless Motor Car Corp.
• RVB Revere Copper & Brass Inc.
• SVE Seagrave Corporation
• THO Thompson Products Inc.
• TTC Truax–Traer Coal Co.
• UD U.S. Industrial Alcohol Co.
• UF United Fruit Co.
• WAL Walworth Company
• WM Western Maryland and Railway Co.
• WNO Wesson Oil & Snowdrift Co. Inc.
• WY American Woolen Co. of Mass.
• NX National Dept. Stores Inc.
• ER Eastern Rolling Mill Co.
• JKS Julius Kayser & Co.
• FO The Foundation Company