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Not sure if the 1K Blue is a PR2, a PR2a, or a PR5; and if the 2K Brown is a PR3 or a PR6.
What you have is PR5 & PR6. PR2 & PR3 pictured below. There's an easier way to tell them apart beyond the shield/lines. If the "banderol" (that curly thing) is coming off the eagle's crown, it's the earlier issue. If coming off the eagle's beak, it's the latter.


Re the 1920 newspaper issue, from what I've seen, they don't have a premium. Can be found for same price as imperf on Delcampe, for example.