Transcription Mystery Disc #32

In this rare example I have the call letters clearly labeled on the transcription disc. It is an outside start 78 rpm transcription disc as labeled.The condition is pretty good.

But what's odd is that Nelson Ideas was an advertising firm located at 208 State St., Schenectady, NY. It's president was George R. Nelson. I know little of them except that they're listed in a few directories in 1957 and 1960. It was around long enough and with at least enough local standing to be noted in the autobiography of Pee Wee Erwin This Horn For Hire.
 
At first I considered the possibility that KCMC are not radio call letters.  In 1959 (our approximate window) KCMC was in Texarkana on 1230 kHz. The station had been on the air since 1932 which explains why the heritage calls are still in use today, albeit on 740.  While Nelson Ideas and KCMC are easily 1500 miles apart the customer Dillards was a national retail chain. For a Little Rock-based chain, Texarkana is a local market. Their connection to KCMC could have been very strong as an account. Dillards was founded in 1938 but didnt' start expanding with investors until the late 1950s. So what we have here is an advertisement from very early in their history. But the question remains.. did it run?