Straight stem are Baseball specific. All are second gen frames. I can get as detailed as you want... but those are the basics.I know these are M-Frames but I'm not sure of the vintage. I do know I had these back in the 1990's and maybe earlier. I used them in my mountain bike racing days but I digress. One has different stems and all 3 frames have different print patterns. I also have a about a dozen lenses to go with the frames. So.... what can anyone tell me about these 3 frames. Thanks.
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