Hello Mr. ARAK, nice early mod-39, with 4digits. Its not first year. Its post 1957 because it is model stamped. $679 is a fair price with 2mags. I would be in at that price, but I collect them. The early series is known as 9MM/DA
or pre-39. Buy it and shoot it.
Nice early Model marked 39.
There were several changes (improvements) implemented by the time your gun was produced, the ones that jump out the most are the long safety lever and relieved left side stock top to clear it, the other is it's long tang to eliminate slide bite when held too high with chubby hands.
There were a few other little changes as well but those are the biggies.
If you want to start a 39 collection that would make a nice beginning piece, if you are strictly looking for a shooter I would recommend looking for a 39-2 mostly for its improved extractor, there are no replacements for the older style wide extractor if it is ever broken.
I just edited my post to add the magazines are correct from what I can see from the side.
The metal figure 8 follower changed to a plastic flat follower very early in the beginning of the 39-2 IIRC.
The very earliest guns had a flat metal follower.
One of the "good" things about OCD is it makes you hyper sensitive to little things, but then you can't unsee them.
Having OCD myself I usually notice little things but have to admit I have never focused on the baseplate rollsyamps or noticed that the okd ones are stamped 9mm.
Just pulled Pre Model 39 Blue, Serial 1644 shipped July 1956
Model 39 , Blue
Serial 68490 shipped Oct 1966
Both have the 9mm stamp, while both came to me with only 1 magazine the 56 ones likely original as it has a flat steel follower, the 1966 gun has the figure 8 follower but there's no way to know if that one came with that magazine from the factory or not but it came to me that way.