They didn't use gold movements unless it's a one off custom piece where the maker was exhibiting his skills. They are brass or possibly gold plated/washed.
Some watches had a gold "train" which was the main gears that power the watches hands.
I'm pretty sure Elgin never made a solid gold movement. The watches they made were for everyday people and when I say watch, I mean the movement. You bought the movement then had a case picked out or if you had some money, had one custom made
The higher end European companies focused more on the movements itself. Wether is was form or new technology of the day, they were cutting edge