The Precision Scale Co.(PSC). part number is Catalog NO. 1. Which is O and On3 Detail Parts Catalogs. There are two books the first catalog is 'O and On3 Steam Locomotives Detailing Parts in Brass and Plastic'. The second catalog is 'Catalog of Detailing Parts for Freight and Passenger Cars O and On3'. Catalog was printed in the 1990's. Great information. Excellent Condition. Check out photos. USED/AS IS
