This is an early 1940s vintage letterhead from "Precision Thermometer and Instrument Co." located in Phila, PA. The letter is dated 1941. Condition: All radio related paper items offered have scattered handling wear, creases etc. Please see scan and contact me with any questions. See my listings for a large selection of vintage radio related paper items (regarding crystals, radio station letterhead, correspondence, etc), as well as other unusual, interesting and fun vintage items. Multiple purchases are combined with a single postage charge. Shipping is 2.99. All items are shipped flat, sleeved in plastic, and packaged between sturdy cardboard.