[Bakha]

If I were doing this, I would probably handle that via the main description as well. I would probably also have the ability to tell the maker of an item dependent on the skill of the person who is viewing the item. I'm still not sure that they should be able to tell definitively on first glance who the maker is. After all, art forgery still exists. Knock-off guccis can be found just about anywhere.

I would probably do it like this:

Allow crafters to sign their items.
Have skill level of crafter taken into account when an item is crafted.
When another master crafter (or maybe a master user of that item type) looks at an item, they can see with how much skill the item was crafted and get it when they assess the item. The accuracy of their judgement increases as their skill increases.