Randy interesting, you have a receiver made in 1899 that should have a cut-out in the receiver to accept a joint check. The locks should be a 6 pin configure and should have had the Type II hammers. The barrels are from 1900 (probably October)and should have been on a 3 pin configured lock. The barrels should not have the joint check pins on the side of the bottom lug. So yes this gun is a parts gun. There was smokeless powder then and before shooting it with low velocity low pressure shells I would have it checked by a competent gun smith that knows L.C. Smith's. After that, good shooting as many of us in the organization shoot hammer guns.
As for the hammers, look at eBay or if you are a handy person Dixie Gun Works has them but they are a blank casting and have to be fitted (orientation of the square hole for the tumbler has to be right)