I think it depends; some do and some don't. iirc reissue Sixshot and TFC Hound have the same stampings as the originals. Likewise the Hasbro reissue* of Magmatron. I'll check again when I'm at home.

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*Hasbro Magmatron's as much of a reissue as say TFC Gears or Encore Sky Lynx et al.