Thank you!
I’m gonna take a stab and say, that I think the engraving is original, and the style seems rather clean, not unlike late Edwardian to early Art Deco. It’s not very architectural in style, but simply an oval expression of the Roman 4-line Rondel. Something about the corners of each letter looks folded, if you zoom in, and gives a 3-D effect resonating more Edwardian than Deco, perhaps.
So with the patent date, the particular blush peach color of the gold, and the engraving style, I expect this was made squarely between 1907-1914.
I wish I could find out who ordered it from Durand & Co.
Wouldn’t that be a scream!