US Public Health Service Spencer Colorimeter Model 10131 American Optical 1950s
The product is a vintage Spencer Colorimeter Model 10131 by American Optical Company from the 1950s. This collectible lab instrument is designed for color reading and quality control purposes. The model 10131 features a 115-volt, 15-watt lighted colorimeter, making it a unique and rare piece of vintage scientific equipment from the United States. This antique Spencer colorimeter is a valuable addition to any collection of lab instruments or vintage American Optical Company memorabilia.