Original Muffler????? Take a look??Opinion Please

[msmaron]

Just found this and did some measurements, Seems all correct including same size tail pipe and intake from end to muffler and out again. Any opinions would help please. To answer some other questions, i am aware that an Aries muffler is great and it can also be used in fine point, however i am asking for reference purposes and originality.
I have included some important pics including welds, and but welds in the muffler body etc.

Thanks in advance