Hello Nick,
Well, it is 100% a Leitz Odin Netherlands camera, from sometime in 1940.
(I would be safe to say post July 1940)
Many Leica`s sent to occupied Holland received the NL engraving`s there after import, it was done BEFORE, DURING and AFTER the war, so I would figure it has alot to do with the Dutch Taxes, even though the post June 1940 cameras were all sold to German forces stationed in Holland after the invasion.
(I have seen Leica`s built as early as 1935 with the N-L engraving)
According to Jim Lager, the Holland records were very strangely kept, showing many IIIC`s listed in number but written down as IIIB`s etc.
I once owned a extremely early IIIC that was issued to Holland in late July 1940 (Black Shutter IIIC ~ oldest known surviving Leica IIIC N-L , it was a WW2 US Army capture from Holland a 101st Airborne officer acquired it from a German POW ~ it sold to a prommident Italian Leica collector along with my 42' U-Boat Kriegsmarine IIIC/Xenon combo)
and that N-L camera was part of the last batch of IIIC`s that was written up correctly in the Leitz Docket books in July 1940.
Seems that someone was trying to juggle the books? with the cheaper prices of the IIIB possibly????? ~ Wartime records are sometimes very strange when it comes to cameras.
But, I will run the numbers by Jim Lager and then report back to you, I would suggest that the Elmar on it is more than likely the original lens (just seeing the number, it`s in the proper issued/sales bracket).
The camera is a jem, very few N-L`s have survived the war, and since I have written up threads about this and have brought the attention of these "history filled" cameras the values have also gone up.........it seems to be a fine condition and JUST with the Elmar, I would place it in the European market at about $800 to $1,400 depending on who`s looking, (WOW! I just noticed that the ORIGINAL Leitz camera strap lug rings are still on the body.....those too normally NEVER have survived the war and were dented/bent and broken off etc.)
You have a really interesting little camera, and I would clean it up and load it with some fresh film and go shoot some beautiful Dutch countryside with it!!!!!
Enjoy!!!!
Tom