Need help with correct magazines for my lugers

[emrisg]

I have a s/42 and BYF 42 Luger and was wondering what the correct magazines would be for these pistols.

Byf 42 s/n 2838

S/42 s/n 4870

Both guns are all matching except for the magazines.

I looked in my Jan Still books but was still unsure.

Thanks for your help.