Pre WWII Coronado radios can be identified in more than one way, sometimes on the same set. Gambles/Skogmo contracted to have the radios built for them and as a result, they are numbered in various and inconsistent ways.
The first place to look, as is the case with this Coronado Model 1170 Console,
is for an ink stamped number on the back of the chassis, as shown here:
In other cases, such as this Model 650,
the number is stamped into the bottom of the cabinet.
I have reason to believe that this particular model was produced in Minneapolis, MN.
Another manner of identification that was used, was to stamp a 3 or 4 digit number into the top of the power transformer bell.
Those manufactured by B.R.C. tended to be stamped with either ink, or stamped on the transformer.
B.R.C. also produce radios for Firestone and GoodYear.
This 1934 Coronado "Tombstone" Model 7735C0, is actually Model 7735 (The letter and number were to indicate production runs, or production changes.)
was not marked at all on the chassis, but the tube placement label was intact, and fully pasted in place.
Many times those tags are applied with only enough paste to hold that paper in a small spot, and as a result, the portions that are not adhered to the cabinet fall off, or get torn. Sometimes that important model number is also printed with a red ink that fades over time too.
This radio was produced in Chicago, IL, in plant "S".
The post WWII models of Coronado were also produced by various manufacturers, and those were often indicated by the first portion of the model number. 05RA, 15RA, 43-, 43R, and 94RA**-.
I do not know which manufacturer was represented by the prefix.
Things get a little bit complicated when searching for a schematic. Rider's is straight forward, but the company ceases print about 1950. Sam's Photofacts, are still in business, and they started right after the war. Sams online search, however can be confusing in some instances, they had more than one individual compile that information, as well as the untold numbers of people who compiled information over the years too, and this resulted in variations in how information was entered. The result is: You need to try several variations of your model number. The other option, and perhaps the better option if you are a collector, is to simply download their complete index. The complete index allows you to see how the information in the index itself is compiled, and allows you to find the information- if it was printed- quickly.
In many identification/value guides, the plant of manufacture prefix is often ommitted on some models.
Lastly, Gambles/Skogmo was in financial troubles in the eighties, and the company was purchased by Wickes Lumber company.
For some additional information on the history of the Gamble's/Skogmo store chain, and Bertin C. Gamble, go here for quick thumbnail history.
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