Arts & Crafts Mortise Lock Thumb Turn Knob

This is a lovely brass or bronze thumb turn that could have been manufactured anywhere from 1910 – 1940.  It has a simple shapely backplate and a large knob that is knurled on the edge.  This piece can be used to throw the deadbolt on smaller mortise locks or is also appropriate with the large entry mortise locks.  

Back plate is 3” x 1-3/8” (can be installed vertically or horizontally)
The pin is 3/16” square and extends 1-1/8” into the door.