I have been recently piling up descriptions of clothing in our
territory and have come up with this leather goods:
in 1544 inhabitants of Ljubljana had to pay 1/2 krajcar (a small value
coin) of toll for a pair of sole leather
(Josip ontar, Drobec registra ljubljanskega nakladnikega urada iz
leta 1544, Kronika XVI/1, Ljubljana 1968, str. 32)
nothing earlier so far but that is not suprising given the small amount
of such descriptions anyway. hope you will find it ineteresting.