Nick O' Time Tunometer 1920s: Any Info please?

Hello everyone,
I've just registered as a new member as I have a question if I may: does anyone have any info on a tuning unit from the 1920s (probably), called Nick-O-Time Tunometer?
I've only managed to find three ads on 1926 and 1928 Wireless Weekly magazines ("the greatest advance yet made in inductive tuners. Infinitely variable all wire tuner" - please see attached pic).
It was produced by Tunometer Works, Gosford Road, Beccles, Suffolk, but I seem unable to find any info on the company either.
Any help is much appreciated! Many thanks in advance 😀Â

Presume it’s a roller coaster type tuner, I.e. variable inductance by continuously tapping the inductor.

Page 300 has a write on the item. Experimental Wireless May 1926
https://worldradiohistory.com/UK/Experimental-Wireless/20s/Experimental%20Wireless-1926-05.pdf

@nuvistor Thank you very much! Super.
I was actually also wondering if anyone has ever seen one anywhere (museum, private collection, etc) to see a picture of a real one and not just a drawing, and/or if there is any info available anywhere regarding it and its manufacturer, as I don't seem to be able to find any.
Thanks again! 🙂
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