PPK RZM rig

[sdmark777]

This is an old thread, but I am hoping someone here can answer a couple of questions about this PPK.

Approximately when (year and/or serial #) the early 90 degree safety transitioned to the 45 degree safety on PPK's?

Approximately when (year and/or serial #) the PPK mags stamped with just the Walther Banner transitioned to mags stamped with PPK, caliber and the Walther Banner?

Thanks