On Apr 06, 2017, at 09:25 PM, Michael Urness  wrote:

That does not look like a MF or G-P product but more likely a Mueller from
Decatur, Illinois USA.


so someone just replaced the original  chuck with the MF one then ?  Possible i
guess.

Schuermann's patent from 1889 sure looks similar...

http://cfales.sos4net.com/articles/Decatur_Mueller/DecaturCoffin_Mueller1.html