I'd say yes. It's a unique Lever Rifle (although, in all truth, the Lever Rifle was there first, and Lever Rifles can't repair it).
It has 50 damage per shot. It also uses .44 Magnum ammo, which is hard to find. It has a 15 round clip and uses 25 AP per shot in VATS. It can be repaired with Hunting Rifles. It is also very accurate: at 100 small guns, it hits exactly where you point it at. It has an x2 crit multiplier and has a guaranteed Sneak Attack critical. Yes, it's worth it. You'll find it at the Museum of American History, in a display case on the top floor of the offices, in perfect condition (600 item health).