ORIGINAL: lousyflyer
Any ideas as to what they fit? And what the little eyelet was for? It has a flexible section- even makes that BBBRRRRIIINNGG noise like a door stopper when you pluck it!
Those were known to repeatedly bounce off the prop if you didn't connect them to something. You only do that once! [&o]
Those type needles fit some old McCoys, Wen Mac, Wasp & Atwoods (I think). They usually have a spring around them, something like a ball-point pen spring, to help keep your setting.
The company also made them to fit other engines like the OK Cubs that use threads on the outside of the spraybar.
George