One thing to keep in mind about this gun vis-a-vis 1899 Army contract
guns is that in about 1903, the barrel OD at the frame face was
increased about 0.040", and the frame was thickened, as well. The
shoulder on the barrel was added at that time, and we know this to
be the 1902 1st-change. From this point on, this is the barrel
configuration.

So - an 1899 Army barrel would not fit on a 1906-ish gun. The OD
of the threads is just too small, and the barrel would just flop in and
out of the receiver.

There was a Navy contract in 1902, but I think those guns are in the
25,000 serial number range - before the 1902 1st-change happened.
I'm not aware of any Army contracts after the 1902-1st change, but
there may have been one, or more.

One of us might want to post a message to Roy, asking if there were
any Army contracts from the date of the 1902-1st change, forward to
about 1907 or 1908.

Or maybe Ed Cornett knows.

Regards, Mike Priwer