Turns out it may be one of a number of things but Peruvian AF looks to be the closest design wise so far. The French AF one has a wider prop at the top and very little height difference from top of the wings to top of the prop.
Wayne
Peruvian AF button as per Scovill Mfg Co one by
Wayne, on Flickr
My button
IMG_20190109_212248 by
Wayne, on Flickr