Here is the striker and spring set-up. The parts kit did have some mixed receiver sections, the front of the receiver was marked 1942 as well, so the center section is incorrect, but all of the pieces could be mixed up. Complete parts kits with "good" cut locations are almost a thing of the past. Not many of these old girls left out there any more.
This gun was built by Lyndon Yates at Kiwi's Custom Guns. Very talented gunsmith, and a nice guy to deal with.
https://www.facebook.com/kiwiscustomguns