Apologies for bringing this topic up again but having read through all the relevant threads (I think) I am still not sure what the consensus in the UG community is about these strange Polerouter Sub dials without the actual model name/logo on them (if there is any sort of consensus at all): (Pic borrowed from Diabolik) So to separate the light from heat and for a simple Universal novice like myself can you please clarify what are the going theories on these anomalous dials. Do you think: 1) They are original UG factory printed dials with either a typo or deliberate absence of the text. Perhaps due to trademark lawsuit/threat by a competitor or simply messing with the layout? 2) They are period correct only for early 2nd gen Polerouter Subs, i.e. a Transitional dial. So far the serial numbers on the admittedly small sample size are all over the place. And why would they omit when the earlier First Gen super compressors already had "Polerouter Sub?" Brief run of errata quickly corrected? 3) They are service replacements from much later like the 1970s (perhaps a cache has recently been found since they are only now cropping up?). This might again point to a deliberate omission of the model name -- perhaps for interchangeability on another model planned but never executed or again due to (later) trademark concerns. 4) Or going back to the errata theory might they have been stored/mothballed for all these years because of the mistake of the omission of the model name and some lucky bloke has only recently stumbled upon them, hence their seemingly very recent "debut" as a known dial? 5) Are they an aftermarket item entirely -- but if so why execute it so well and then leave out one of the main essential details of the dial, i.e. the model name, that would be sure to raise red flags?? 6) Some other possibility that I haven't mentioned? Thanks in advance for any info or opinions you feel like sharing. Not trying to start a brawl but I don't necessarily agree that topics should be out of bounds until there is absolute concrete proof one way or the other. Informed conjecture can help set up the perimeters of debate and if nothing else establish a community consensus, as well as spurring participants to ferret out more actual data. Plus this may hopefully have the benefit of putting the opinions on these dials in one straightforward post for future references, as well as eliminating some theories entirely... and perhaps bringing new ones to light! Best regards, T.