Do a search on "Luger Parts Diagram". There will be some pictures of what you are looking for or you can go to almost any one of the parts suppliers listed from that search and find a parts schematic on their individual pages.
They may use slightly different names. For instance, what your manual is calling the "Sear" is probably what is identified as the "trigger bar". The true sear is just a projection on the back of the trigger bar and not shown in these pictures, but an understanding of what the sear does would allow you to quickly identify the trigger bar as the sear from your manual.
You can also do a search on "gun sear" or just "sear" for a better understanding of what the sear is and does.
Hope this helps.
Doug
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