Why some items have not have assigned Tier?
I was going through items which are with assigned Tier classification and I realised that some items- which are Weapon, Helmet or Armour- are without a tier. I noticed it is particularly with items which are believed to non- obtainable for example:
Crown
Witchunter's Coat
Red Tunic
White Dress
Tunic
Girl's Dress
Wooden Sword
Light Rapier (not on market- only cyclopedia)
Enchanted Staff
Ornate Testplate (not on market, nor on cyclopedia)
Test Weapon for Knights (not on market, nor on cyclopedia)
Is it because there are not available anymore in the game at all? Why some items are without a Tier?
Please note that some non-obtainable like Ceremonial Mask, Yol's Bow or Magic Longsword, which they have Tier assigned.