This is the thick side variety in 40-60 Marlin cal. According to the Survey of Cartridges by Porter; there were only 6 made in this caliber! 24k serial range with a 32″ bbl, ram rod and sling swivels. The bbl is a grey/brown patina with good markings. Receiver is also an aged grey color. Nice tight action. VG bore. Wood is way above average for a musket and looks good! This High Wall Musket also comes with bayonet.