Originally Posted By: Drew Hause
George and Alan: Wm. Enders Oak Leaf, Enders Royal Service, Royal Field, Royal Western, and Special Service were Crescent tradename guns for Simmons Hdw., and possibly Shapleigh Hdw. Co., St. Louis.
Enders Royal American was a Hopkins & Allen double; Enders Royal a Hunter Arms Co. Fulton tradename double.
Wm. Enders was Sales Manager in 1904, and Vice President of E.C. Simmons Hdw. in 1914.

You can find an estimated DOM here
https://docs.google.com/document/pub?id=1OxZo5Tkvx2G8eYf747QR9B5RJdN6Siu5JGIhfguSXXQ


Looks like mine was made in 1911.

Alan