S D Engle's Patent Apr 24 66 on C J & Bro eagle hallmarked silver HC

[watchbob]

Anyone recognize the S D Engle Patent ( dust cover for the winding hole ?) or the maker of C J & Bro hunter case ??
came to me with an early USWCo Marion in it

 

[Steven Thornberry]

This, at least, would seem to be the patent.

US 54135

 

[watchbob]

Thanks for the Patent info - apparently not widely adopted ! unique simple idea !
Any idea on C J & Bro case maker
Bob

 

[Fred Hansen]

Celestine Jacot & Brother - Philadelphia, 1852-71