This old gun needs an identity.

[Shadowrider]

That puppy be old!
ETA: if this link is correct it’s a 2nd change

SMITH & WESSON .38 Hand Ejector Model of 1905 :: Gun Values by Gun Digest

A continuation of .38 M&P Hand Ejector series. Built from 1905 to 1906. Available in 4-, 5-, 6- and 6.5-in. barrels. Finished in blue or nickel, with round or square butt. The .38-caliber serial number range 62450-73250, with about 10,800 produced. Note: Prices for the following four variations...

gunvalues.gundigest.com

 

[Snattlerake]

Is it a 5 screw?

Four on the locking plate and one in front of the trigger in the guard?