old 3-button industrial fan (?) switch

Here's the most recent addition to my 'vintage electrical switch' collection (which I've only shown a few of, gotta work on that...) found in a cardboard box otherwise full of old lamp parts at an estate sale not too long ago. Its black painted steel case is roughly the size of a typical light switch/box, and it features a red STOP button in the middle with black FAST and SLOW buttons flanking it. Either the FAST or SLOW buttons can be pushed and will click and remain 'in', pushing the springloaded STOP button resets either to their neutral/off position, pushing either FAST/SLOW while its opposite is already engaged will click twice to get thru the reset position.

Only a tiny bit of its exterior original makers/specs nameplate survives, with no remaining info but the (partial?) words "FAN M" on it. I was hoping there might be stampings/etc inside to still identify its manufacturer, but there aren't. :-(

OH -- another 'fun fact' -- that whitish layer of something seen (in pic #4) lining the inside back of the box itself is no doubt genuine **ASBESTOS** insulation. <EEEEK?!!> With that I suppose I should now be running for the phone to call the white-suit-crews for "abatement" of the "hazard" lest I suddenly succumb to any of a dozen different varieties of cancer/etc...but oddly enough I don't really feel inclined to give a sh*t about that, since I also don't have any particular plans to scrape it all outta there then eat it/rub it all over my body/yada yada... <LOLOL>