That gun is typical of the type that used to be called Saturday Night Specials. It was a popular design around the turn of the 19th century (into the 20th century) and it was a type that was made cheap, fast and in large numbers by all sorts of small gun manufacturing companies.
I really doubt that it would be clad in gold, though, and suspect it is some other sort of metallic coating. It would be the same as gold-plating a fender washer for a regular Ford Taurus, no real sense in it. The fact that there is no name of manufacturer or serial number showing lends more credence to it being something of a Saturday Night Special.
More for looks now than actual use.
If in doubt though about the metal cladding, take it to a jewelers for their advice.
Here is a website showing some similar guns.
http://www.armchairgunshow.com/otsDSZ_spurtriggers.htm
The Doc is out now.