Help with a "model Name" or "rate of twist"

[outlan22]

I have recently acquired a .58 cal muzzle loader marked Safari Arms Limited-Toronto-Ontario. There seems to be no markings as to a model name.
Was wondering if anyone might recognize it, am thinking it is a discontinued cal. of the 160 model ,as it is the only one on their website that has the engraving on the stock.

Pics can be seen on attached link.

https://www.dropbox.com/sh/poz9rny635277s8/AAA0WLB-JtJWI3_Hunnaha6Xa?dl=0

 

[BlackPowderBurner]

Looks much more like an Investarms model 200 to me, probably an older variation. You should be able to find the exact year of manufacture by looking up the two letter code in the box on the barrel towards the breach on the left hand side.

 

[outlan22]

The letters are " AH " , would you happen to have a link i could follow to look up year of manufacture?

 

[outlan22]

Found the year codes, looking like it was manufactured in 1981.

 

[gunsaholic]

Likely an Invest Arms. There should be a capital "I" on it somewhere.