D. S. O. CODES (Domestic Special Order)

    Many vehicles such as police cars, taxis and trucks have special equipment installed at the factory, and are identified by a D. S. O. code.(Domestic Special Order).
    D. S. O. codes have been stamped into truck plates since 1957 and passenger cars since 1962. In addition, all vehicles delivered since January 1962 with special equipment , have a blue envelope in the glove box containing a copy of the Special Equipment Parts List used on that particular vehicle. The selling dealer also has a yellow copy.
     A typical D. S. O. number might be 13-0645. The ( 13 ) indicates the district ( in this example, New York ) in which the vehicle was delivered. The ( 0645 ) indicates it was the 645th vehicle with special equipment delivered for that year. On some plates you may find a D. S. O. number such as ( 13- ) without a second set of numbers. This is NOT a vehicle with special equipment. The number ( 13 ), for example, refers only to the District ( New York ) in which the vehicle was delivered.
     To order special equipment parts for vehicles delivered after January 1962, simply use the D. S. O. parts list in the glove box. If this list is not available the use the D. S. O. code on the Identification Plate or the Certification Label. If neither is available, give your Ford or Lincoln-Mercury parts manager any information stamped or stenciled on the part you may need. He can then deliver the correct part you request.
     Heavy and Extra Heavy Duty trucks built at the Louisville assembly plant between August 14, 1967 and Mid-Year 1970 have a Truck Specification List ( T. S. L. ) in the glove box. From Mid-Year 1970 and for all 1971 truck models you will find a moisture-proof laminated T. S. L. located as follows: All units except W, WT-9000, F-700, F-750, C and CT series with sleeper compartment and "B" series cowl units have the T. S. L. attached to the right hand side of the upper inner back panel.