Greg,
* You are essentially correct. But be aware, there are few absolutes at Lugerland transition points. Only what is likely or most often seen!
* While less than a dozen reported 1936 chamber dated Lugers bear a blue tubed-droop winged Eagle 63 mag before the "m" block (some as early as the 1936 "g" block), the major transition to the blue tubed Mauser Military, Type 2 mag (2-MM-dE63) is generally accepted to be the 1936 "m" block. This based on an increasing frequency of blue tubed, matching mag examples seen after that point.
* The blue tubed cut over did not occur instantaneously at a set S/N; but, phased in over a number of subsequent S/N blocks. The 2-MM-dE63 slowly replaced the nickle colored tube (1-MM-dE63) as they were used up.
* Consequently, correct matching mag or dual matching mag example "exceptions" can be found both earlier and later than the "m" block. This is where judgement and experience, honed by years of critically examining honest and not so honest Luger examples, can prevent mistakes.
* Now that being said, it is highly likely the "k" block mag Leon offered as an example and Frank confirmed is period correct for your 1936 "k" block.
* As to your "q" block mag(2-MM-sE63), it could be a 1937 mag as this was the transitional start of the dE63 to the sE63 mag acceptance. More likely, it is a 1939 mag. Only way to definitively tell is by the size of the sE63(small, medium, or large) and this differentiator is still subject to some debate in Lugerland.
* Hope this "shade of grey" answer helps.
Respectfully,
Bob
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