New $330 from Bass Pro Shop used about $200 in good shape.
Blade type mounted on a dovetail cut in the barrel
Any bullet that has a diameter of one half inch is a .50 caliber bullet. There are different .50 caliber bullets- my Hawken muzzle loading rifle shoots a .50 caliber lead bullet, but different from the .50 Browning Machine Gun (that is also used in the .50 Barret sniper rifle)
Well, it is a Hawken rifle (name of the brothers that created it in the 1820s) There were no specific "models" as such- each rifle was hand made. Known as Great Plains rifles, unlike the Pennsylvania or Kentucky rifle used in the East, the Hawken was made for the Western frontier. They were shorter than the Pennsylvania rifle, larger caliber (usually .50 or larger), half stocked, and had a double trigger. Very reliable and very accurate.
Hawken
The name of the rifle is Hawken, after the original makers, Samuel & Jacob Hawken of St. Louis MO. The name became used by other companies making a rifle that was large bore (.50 or larger) with a half stock, and set triggers. Many companies make, or have made, a Hawken style rifle. However, the "in line" muzzle loader rifles have reduced interest in traditional side lock rifles. You may want to check on line gun auctions, such as auctionarms.com, or gunbroker.com for examples. MY Hawken is a Thompson/Center "Renegade" .50 cal- and it is a great shooting rifle.
You need to give us a lot more information before we can make an educated guess. On a true antique Hawken, the condition will determine the value. You will really need a hands on appraisal.
Investarms out of Italy.
Most black powder bores have a twist that is relatively slow. Say 1:36 or 1:50. They were 1:48 twist in 45 and 50 caliber
The original was in caiber .44 Henry rimfire. Currently in caliber .22 rimfire. Which one?
Sure. I like pictures of Hawken rifles.
The current value of a remington model 600 in .243 winchester caliber is between 160 dollars for a rifle with 60%of its original finish remaining up to 475 dollars for a rifle with 100% original finish remaining.