16710 with 3186 Movement - Serial Question

[Lord Tomato]

Hi,

I've been offered a 16710 with a 3186 movement from a trusted individual. I do trust this person, but it never hurts to double-check with you experts here. It's a Z5 serial. As far as I know, the 3186 movement was introduced during the later parts of the Z serial's production. It also comes with warranty papers instead of the credit card-style warranty which was introduced later on.

Does everything check out regarding the warranty document and serial?