Old school muzzleloader conversion

[percussionpirate]

Picked up this for 150 the other day. Never seen anything like it. Was converted from rimfire and tubular magazine welded, these have been around since the late 1800s. Figured you guys knew more about a relic like this.
Vetterli m78 made in Switzerland. If anyone wants any better photos, ask

 

[deermanok]

Wow, that's wild.

 

[Dieselden454]

Pretty cool looking.

 

[Philgumbo]

What caliber?

 

[percussionpirate]

What caliber?

.41 Swiss. The previous guy was shooting patched .395s through it