[Arran]

 Another possibility, other then a possible typo, or just plain confusion over two of the three top models having a Deluxe and Standard version but the third not (in the auto business they typically call these trim packages) perhaps Philco did intend to offer a non teledial equipped version of the 37-690X when the ad was compiled. Just like with the auto business advertising campaigns were planned well in advance of the introduction of new models, we will likely never know for certain but perhaps the advertising people genuinely thought that there would be standard and Deluxe versions offered of the three top models on the Philco lineup when the campaign was planned either because Philco intended to offer two versions of each, or because there was a communication breakdown of some sort. However I would think that one of the prior two explanations was the reason behind the copy in the early ad, a typo, or confusion between the top three models and their respective trim packages. I for one kind of wish that Philco would have made a standard non teledial version of a 37-690X, that telephone type dial clutters up the control panel somewhat rather then enhancing it in the way it does on a Grunow Teledial, for example.
Regards
Arran