Recently picked up a model 1893 Winchester. It has a 20 inch barrel, which I assumed had been cut down from 30 inches. I bought it cheap because I just wanted it for over the bar in the basement.

Imagine my surprise when a little research shows this to be one of 644 factory made 1893 riot guns with factory 20 inch barrel.
The factory letter confirms that this gun left the factory in this configuration.

The gun is in 70-80% original condition. Not much info out there on these. Would anyone have an idea on value?