Which bracket to use?

I know I need a S500-18 spiral balance with a red tip. I'm now wondering which bracket to use with it? The existing bracket is 3/8" wide and 3 1/2" long. I think the closest thing to it is the 17-012 bracket.

Original balances are 70 to 80 years old. Glad I could find a supplier because there are none in Canada.