In which book did you find that information? I'd be interested in finding a copy.
Interestingly, your serial number is near the range of some Remington Old Armys issued to the Union Army:
9437 - 10/01/64 - CO I, 4TH WISC VOL CAV
9437 - August 64 - CO I, 4TH WISC VOL CAV
9437 - (another issue, unknown date) CO I, 4TH WISC VOL CAV
9448 - 2/01/65 - CO F, 6TH MICH VOL CAV
9488 - 10/01/63 - CO B, 10TH ILL VOL CAV
You'll note how the same revolver got issued three times!
Here are some leads on dealers that sell both original and reproduction parts: