The hand-crafted Armet is superior to it's marketplace variant but a lot more costly.
Found in the marketplace with a lot smaller price tag.
The Armet is the most expensive and protective headgear available in Mount&Blade: With Fire & Sword. It costs 81000 thalers (45000 if the player is lord of the town) from armorers and can also be purchased in the marketplace with a base head armour rating of 55 with a potential for prefix modifiers. It is also considerably cheaper when bought through the marketplace (under 20000 thalers). The veteran Swedish Reiter wears this helmet.
It is usually worn with Black Armor to give the highest armor rating possible.