DSO - District Sales Office

If you notice below, there are 2 different DSO codes for the Buffalo NY, Pittsburg PA, Philadelphia PA, Cincinnati OH, Louisville KY and the Washington DC. District Sales Offices for the 1966 model year.  While these may not be the only changes that Ford made to the DSO codes during the model year, they do represent one situation where having the most accurate DSO code from your car have helped to determine the change. 

While I am uncertain of when the code change actually occurred, I have been able to determine the approximate time when comparing the DSO and DATE codes.  I imagine it was in the beginning of the 1966 calendar year (1-1-66) based on registry data.  However, to keep the registry as accurate as possible, I have noted the latest and earliest dates in the registry's records in the DSO description field of the registry.

DSO information found in owner's manuals also help support a theory that the difference may have only been an address change as the manual's First Printing (Aug. '65) has only DSO codes, which include the early ones for those mentioned above, while the Second (Dec. '65) and Third (May '66) Printings have the address' listed.

A picture from the back cover of a Second Printing owner's manual is at the bottom of this page.

   
Code Description Which Covered
11 Boston, Massachusetts Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Northeastern Connecticut
12 Buffalo, New York (before 11-30-65) Upper and Western New York and Northern Pennsylvania
13 New York, New York Southeastern New York, Southern and Western Connecticut and Long Island
14 Pittsburgh, Pennsylvania (before 11-1-65) Southwestern Pennsylvania and Northern West Virginia
15 Newark, New Jersey New Jersey
16 Philadelphia, Pennsylvania (after 1-5-66) Southeastern Pennsylvania, Delaware and Peninsular Maryland
17 Washington, DC (after 1-24-66) Mainland Maryland, Northern Virginia and Eastern West Virginia
21 Atlanta, Georgia Northern Georgia and Eastern Alabama
22 Charlotte, North Carolina Western North Carolina and South Carolina
23 Philadelphia, Pennsylvania (before 12-20-65) Southeastern Pennsylvania, Delaware and Peninsular Maryland
24 Jacksonville, Florida Florida and Southern Georgia
25 Richmond, Virginia Southern Virginia and Eastern North Carolina
26 Washington, DC (before 12-3-65) Mainland Maryland, Northern Virginia and Eastern West Virginia
27 Cincinnati, Ohio (after 1-4-66) Southern Ohio, Southern West Virginia, Eastern Kentucky and Southeastern Indiana
28 Louisville, Kentucky (after 1-22-66) Western Kentucky, Central Tennessee and South Central Indiana
31 Cincinnati, Ohio (before 12-16-65) Southern Ohio, Southern West Virginia, Eastern Kentucky and Southeastern Indiana
32 Cleveland, Ohio Eastern Ohio
33 Detroit, Michigan Southeastern Michigan and Northwestern Ohio
34 Indianapolis, Indiana Central and Western Indiana and Southeastern Illinois
35 Lansing, Michigan Western and Northern Michigan (except Upper Peninsula)
36 Louisville, Kentucky (before 12-27-65) Western Kentucky, Central Tennessee and South Central Indiana
37 Buffalo, New York (after 3-4-66) Upper and Western New York, Northern Pennsylvania
38 Pittsburgh, Pennsylvania (after 1-17-66) Southwestern Pennsylvania and Northern West Virginia
41 Chicago, Illinois Northeastern Illinois and Northwestern Indiana
42 Fargo, North Dakota Northwestern Minnesota, North Dakota, Central and Eastern Montana and Northern South Dakota
43 Milwaukee, Wisconsin Wisconsin (except Northwestern corner) and Upper Peninsular Michigan
44 Minneapolis/St. Paul, Minnesota Northwestern Wisconsin and Minnesota (except Northwestern corner)
45 Davenport, Iowa Northern Illinois and Eastern Iowa
51 Denver, Colorado Colorado and Eastern Wyoming
52 Des Moines, Iowa Iowa
53 Kansas City, Missouri Western Missouri and Kansas
54 Omaha, Nebraska Central and Eastern Nebraska and Southeastern South Dakota
55 St. Louis, Missouri Southern Illinois and Eastern Missouri
61 Dallas, Texas Northern Texas (except Panhandle)
62 Houston, Texas Southern Texas
63 Memphis, Tennessee Arkansas, Western Tennessee and Northern Mississippi
64 New Orleans, Louisiana Louisiana and Southern Mississippi
65 Oklahoma City, Oklahoma Oklahoma and Panhandle District of Texas
71 Los Angeles, California Southern California and Southeastern Nevada
72 San Jose, California Northern California, Southern Oregon, Western Nevada and Hawaii
73 Salt Lake City, Utah Utah, Idaho, Western Montana and Northeastern Nevada
74 Seattle, Washington Alaska, Washington and Northern Oregon
75 Phoenix, Arizona Arizona, New Mexico and Western Texas
83 Government  
84 Home Office Reserve  
85 American Red Cross  
89 Transportation Services  
90 Export 90 Columbia
91 Export 91 ?
92 Export 92 ?
93 Export 93 ?
94 Export 94 ?
95 Export 95 ?
96 Export 96 ?
97 Export 97 ?
98 Export 98 ?
99 Export 99 ?
B1 Central Region Ontario, Canada
B2 Eastern Region Quebec, Canada
B3 Atlantic Region New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador, Canada
B4 Mid-Western Region Manitoba and Saskatchewan, Canada
B6 Western Region Alberta, Canada
B7 Pacific Region British Columbia, Canada
H3 Canadian Government  
I1 Canadian Export(1) ?
I2 Canadian Export(2) ?
I3 Canadian Export(3) ?
I4 Canadian Export(4) ?
I5 Canadian Export(5) ?
I6 Canadian Export(6) ?
I7 Canadian Export(7) ?
I8 Canadian Export(8) ?
I9 Canadian Export(9) ?
I10 Canadian Export(10) ?
I11 Canadian Export(11) ?
I12 Canadian Export(12) ?
I13 Canadian Export(13) ?
I14 Canadian Export(14) ?
I15 Canadian Export(15) ?
I16 Canadian Export(16) ?
I17 Canadian Export(17) ?