[MarkInTx]

Welcome to the Forum from (northern) South Texas!

The experts will be along shortly...but the odds are that is an aged Italian repro that is missing the wedge screw.
Pictures of the serial number(s) and any/all other markings would be good.

 

[MarkInTx]

1902 is the serial Italian repo was ruled out by a couple locals

There were only 1,100 Walkers original manufactured. Serial number 1902 shows as a 1st Model Dragoon.
Colt Walkers are some of the most faked Colts around.

 

[MarkInTx]

It's tough to get much better than free...unless they pay you to take it.
If the action and timing are good, that will make a fun blaster.

 

[MarkInTx]

For all the goodies along with the gun...that's a pretty darned good deal!
Enjoy shooting it!!