Radarscope / Donkey Kong - validation

[Palmarcade]

Hello... I recall playing a converted Radarscope - Donkey Kong in the early 80s at an Arcade called the Silver Cue in Chula Vista Ca (San Diego) this unit had the 5 hole speaker, one coin slot and a Wood knob on the controller. Was the wood knob factory issue? It seemed legit. They also had two blue units that were visually legit 1981 units. Please advise

[YesAffinity]

I've been doing a bit of research on this subject, since just acquiring a legit red cab (TKG2).  There is a great thread, albeit extremely long, with lots of good information at KLOV: https://forums.arcade-museum.com/showthread.php?t=64571

I've made it through about 50 pages of that thread, and never once have seen any mention of a wood knob.  This is also the first I'm hearing of it in general.  Not that I'm an expert by any means, but I have been devoting some time to the subject recently, and I can say with 99% certainty that the wood ball top was not original to DK cabs, red, blue or otherwise.

Some more info dedicated to Radarscope here: http://www.ostermayer.ch/kontakt.html.  Looking at all those pics, the ball tops are all the standard black.  I'm leaning toward 99.9% certainty on the wood ball top being aftermarket.