The Texas Rangers Commemorative was a 19-3 and it definitely came with gold inlay, but I think you would know if that is what you had. It also had a TR—serial prefix.

The SCSW claims there were some 19-3 over runs for that model that share some features of the Texas Rangers gun, but it doesn’t list specifics.

I would guess that the half-shaved trigger guard is one of those features.