I have three metal drawer pulls that came off of some antique furniture somewhere along the way. They are great old antique probably over 100 years old. They measure about 2 1/2" high and wide with nice engraved ring pulls on them. You mount them on your drawer fronts the same as you do the modern ones. The threaded stem on the backs of them look to be about 1/2" deep. They have a nice patina of time, but they are not corroded.
Then, there are a couple of more mundane globe ceramic ones. I dont think they old, but still quite nice.