I have decided to pass on this gun. It is for sale on GB and can be seen via the link below. My interest was primarily the fact that it has factory 25 1/2" barrels but unfortunately it lacks condition. Maybe one of our members has a fancy for such a gun to chase birds with. Thanks for all the responses regarding the barrels, FWIW I believe the length to be original myself.
https://www.gunbroker.com/item/912634045