Re: Item Card design - Icons Meaning
Yes, the 1 in a triangle indicates that the item is 1st owner.
The boot is the 'basic' chemistry style, this is what all cards start off with, you can apply different chemistry styles to change the boost in stats that player recieves assuming they have enough chemistry.
There is no visual indicator to see what is tradeable and untradeable unless you right click on the card to inspect it.