Lovely SKS...you will end up with more.
With the M prefix I would lean more towards 1960 rather than 59, but that era is still a little debatable. I have an A prefix 59 I built from a barreled receiver and spare parts that is one of my favorites.
Is that a Butler Creek synthetic stock with a painted original handguard?
If you are so inclined, a little patience could find you an unserialed stock which is totally normal for a paratrooper. A little more patience or luck might get you a nice blade bayonet to go with the stock at a reasonable price...if you are so inclined. It is pretty sweet as is.
The blades are getting quite a surprising price lately...even for crappy condition....wait for a good one. If you do go the restoration route...get a real cleaning rod, the aftermarket ones...while filling the bill are kind of junky.
Welcome to the files...good to have you here!