The Green OEM Rubber Strap Question

[DOUBLE 0 SE7EN]

A few days ago I bought the rubber green strap from Panerai Store Istanbul. But unlike the black rubber strap which came with the watch; the green one felt different.. inside the strap unlike the black one; both sides have writing; the left part is made in Italy and the other part is Officine Panerai.. is it normal cause the black one only has inside the short side written “made in austria”