1894 Cowboy = 24" octagon barrel, dovetailed front sight, no barrel band, no sling swivels, calibers: 45 Colt, 357 Mag/38 Spl, or 44 Mag/44Spl
1894 = 20" round barrel, screwed-in ramp front sight, barrel band, sling swivels, calibers: 44 Mag/44Spl
1894C = 18.5" round barrel, screwed-in ramp front sight, barrel band, sling swivels, calibers: 357 Mag/38 Spl