This is too open ended of a question, as many models did. In the late 1920's they started to go from wood to aluminum, so the switch-over started then, and so many older lugers received aluminum with new numbers when a replacement was needed, this is especially common with police guns.
If you get Imperial Lugers by Still, you can see the wide range of lugers that received wood / nickle plated mags.
Is there a reason you are asking, or can give us a lot more information?
Ed
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