Help need - Walther PP grips, 1942

[collani]

Hello,

I want to replace the postwar grips on my Walther PP (Zella Mehlis 1942, SN 279xxx) with WaA359 proof mark.
Now I could get two different versions of old original Walther Zella Mehlis grips for it.
One pair with steel reinforcement "Stahleinlage" on the inside and one (probable) earlier pair without.
Which pair is right for my in 1942 built Walther PP?

Many thanks for your help.

Regards,

collani