The first thing I did was take the Shock Control Era book and compare the numeric series with those on the spreadsheet and add a couple columns for the boxcar identification and the year it went into service. I am not concerned with the year it went out of service if it existed on the 1975 Railway Registry then its fair game for inclusion on the layout. This gave me the type for just over 1/3 of the list (122 series to be precise), which represents 60 different boxcar types that were built or rebuilt on or after 1954. The rest were built prior to that date and of course the reference book for that is out of print and going for $100+ when you can find it. Once the other reference book, "Santa Fe Railway Listing of Freight Cars by Class and Car Numbers, 1906-1991", arrives I should be able to find the the rest of the boxcars classes on the list. Of those already identified I can eliminate anything longer than a 50' car (the layout is being designed around the brick canyon, which will limit freight cars to 50' or less) and any car exclusive to the automobile industry. I can further eliminate cars that are rare as they were unlikely to have appeared in the Patch section of the LA Warehouse District unless they happen to provide service to an industry in that area.
At this point in time there is still a significant number of 40' boxcars on the roster. These consist primarily of Bx-85s, Bx-136s, Bx-126s and Bx-115s. Not surprisingly the 50' boxcars make up the majority of the roster at this point.The most numerous are Bx-72s, Bx-69s, Bx-66s, Bx81s, Bx-74s, Bx-145s, and Bx-70s. Now, admittedly, the data is not complete but it gives me start on what I can find commercially. Of course manufacturer's don't make this easy, rarely do you find the Santa Fe's class listed on the side of a boxcar. So that will take a little more digging up than I care to think about.
|Santa Fe Bx-85, 40' boxcar|
|Santa Fe Bx-115, a 40' boxcar|
|Santa Fe Bx-126, a 40' boxcar|
|Santa Fe Bx-136, a 40' boxcar|
|Santa Fe Bx-69, a 50' boxcar|
|Santa Fe Bx-81, a 50' boxcar|