Re: H & R Handy Gun
Welcome to the forum.
Not much else to say that hasn't already been said. Unless your grandpa has registration papers for that 12" smoothbore - he is in possesion of "contraband" and can be arrested and fined if caught. As it stands - it has no value - as parts it has value.
Jim Hauff ~ H&R Collector In Memory of Bill Goforth and Jim Ritchie