Thx for your replies. It is definitely a normal good quality ^normal^ same under the lacquer, like in the pics. Same seems all there, below the scabbard hangers it does not look there is this lacquer so maybe it was done after or to protect the scabbard (instead of using leather protection)
Funnily enough i found / bought another kai gunto with the same type of saya.
But it really leaves me perplex!