Good condition with discoloration, red marking of the number 500 on front cover. Minor creasing but in overall good condition. I was unable to find a date but it is before zip codes, please view all photos before bidding

Explore the vintage world of The Brown Instrument Company with this catalog No 90 on resistance thermometry. Featuring a wide variety of products, this catalog is perfect for collectors or anyone interested in the history of industrial instrumentation. Discover the type of products available such as thermocouples, resistance temperature detectors, and more.