Hi There,
You have (as others have said) a .45 S&W Schofield, Second Model. The
second model has a steel frame (first models had iron frames) and the
firing pin pushing was considered unnecessary and was eliminate.
From your serial number, it was part of the second contract for 3,000
revolvers.
Yous has the first type patent dates on the right side of the barrel. It was
during this contract the patent date die was changed to reflect both of
George Schofield's patents (not just the one in 1873).
I have a Schofield that is within 300 serial numbers. SN 4343
This one the barrel has been shortened and stamped with the "
W.F. & CO'S. EX"
and serial number in large numbers.
As you will notice, this example has the earlier patent date (w/o the 1871 date).
Needless to say, check your revolver out thoroughly before shooting it. If you
are interested in the inspector markings, we could go into that.
Cheers!
Webb