Vintage Spring THERMOMETER Plastic Wall Mount Shelf By Springfield Instrument Co, Inc  Hackensack NJ 5" X 5" inches made in USA. Uses a spring to determine temperature and works but unsure of accuracy although its reading was the same as another vintage thermometer. Tested at room temperature and put in a refrigerator. The item has vintage wear use with the bottom gold tone appears to be missing paint and is brown. The housing is plastic and may have some surface scratches but no cracks or breaks. Refer to pictures for style, markings, measurements and examples of wear.