"No Lock" "9mm Para" "442/642" " Centennial"
Sounds like the factory Model 942 of which there was only one factory made.. Of course there's a few others that were made one of which I have in my stash of 9mms..
Here's my 642 No Dash that has had a 940-1s cylinder fit to it's yolk & now is a convertable 38/9mm..
Here's a pic right after fitting the cylinder..
Range Report Still Due as I haven't had much time to get to the range lately.. Thanks Obama..
Gary/Hk
Model 942 Convertable