It's really hard to judge finish from photos. I have the impression that the bluing on the barrel and possibly areas of the receiver don't have a consistent look (shiny in some areas, more buff in others). That might be lighting, but it could also be evidence of someone spot bluing an area with a cold bluing salt.
Smell the areas and see if the characteristic odor of cold bluing is present. The odd odor from cold blue is Selenium Dioxide.
I am told that the odor can be neutralized, but have never cold blued a gun and never had to try it,.
Marc
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 Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.
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