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When purchasing vintage sets does anyone here pay much attention to period specific pieces? I don't mean like old grays vs. new grays, but the part differences on the underside of pieces. Sometimes bricklink lists these separately but other times not. I just bought 6375-2 (1980) from a guy on ebay and its clear some parts are newer replacements which annoys me. Pic related top row is 2x2 tiles. The gray one looks original but the yellow is clearly newer as it has the part # on it. Second row is black 2x2 plates. This set contained three different versions. Left with no markings, center with a letter and a number and what looks like the part # or Lego logo melted off (this is also present on the gray tile,) and right with the part #. Am I an idiot and wasting my time worrying about this kind of thing? I think its important the parts are uniform and look the same and sometimes the newer versions have a quite different sheen, or even shade of color on them. Also does anyone know what this melt mark is?
