G Date S-42 Luger

I just bought my first Luger, it is a G date S-42 Mauser. It is all matching except for the toggle, breechblock, and magazine. The toggle and breechblock match themselves, and the mag has an aluminum bottom with an eagle over 655. The blueing is 80% and the straw is roughly 50%. I was wondering how many of these were produced in 1935 and what about its value? I purchased it for $600 and it came with an original hardshell holster in very good condition. It is not import stamped anywhere and it actually has the soldiers initials on the holster with unit markings. The holster is marked WERKE 1915 BERLIN and was originally brown but was dyed black for WWII. Did I get a good deal? Any feedback is appreciated. Thanks, PHIL