WindsorWindsor guitar headstock Montgomery Ward brand made by Lyon & Healy, [Source: Vintage Guitar Magazine Price Guide]

The Montgomery Ward Windsor brand seems to have been around from the 1890s to 1914.

Note there is also a Windsor brand from the UK which was associated with many types of instruments including drums, marching bands and so on. There is another post on jedistar. These may be the same brand.

Harmony http://harmony.demont.net/brands.php

Images eBay: Plate is from banjo.

Windsor guitar Windsor Mondtogomery Ward banjo plate