The gray crinkle finish is indicative of a factory reconditioned model, and as such you can expect there to be differences between it (in terms of parts) and an original model from the '30s. Unless my memory of Royal standards is slipping, the KH(M) never had glass panels like the Royal 10 - and I don't recall off-hand if the touch selector was a feature that was added in subsequent model years. Did you pop off the panel to see if the indicator is behind it?

Uwe wrote:

Unless my memory of Royal standards is slipping, the KH(M) never had glass panels like the Royal 10

The early KH models had black glass side panels. There was a brief period in the mid-30's, just before the KHM, that the H, KH, and maybe some later 10's, had black glass side panels.

Uwe wrote:

Good to know. So you're saying that the OP's '34 model would originally have had glass panels?

Yes. His being a 1934 KH, I believe it would have originally had black glass side panels. His machine looks like it has the plated carriage end pieces and the plated piece on the lower front of the carriage (instead of black), which were also seen on the H's and KH's during this brief period when the machines came with black glass side panels.

OP here -- So looks like I have two non-functioning keys that I trace to missing the shortish wire piece that connects the slug to the long piece that goes into the machine from the keytop. (I apologize for not knowing all the terms yet.) They are the "a" -- pretty crucial -- and the "@ / cents" key (not very). Still, I would like them to work, so this is now my repair task: either forming new bits -- pretty straightforward I think -- or scavenging them from a parts machine.
I may post photos tomorrow (it is at the office). But in the meantime, would you suspect the KH is close enough to the KMM to use the latter as a parts machine for it? i.e., these parts? Just considering my options -- though again, such a nondescript part I should be able to just handbend myself out of some wire.