reproduction versus original 309 master cylinders
 

Is there things to look for when determining an original 309 from a reproduction? Thank you, Joe

Yes,but easier to show then tell.Do you have a photo of the one you're looking @?

Which side do you want to see?....Joe

All 4 if possible.Top & bottom too.

Real? I know the cap is wrong...Joe

Doesnt have the date code like mine has?

There is something there but I'll have to look and see if I can make it out. Should've taken the picture without the bales...Joe

How is the pad with the "US" stamp? I know that even as clean as my original is, I can't make out the US anymore. That's usually the biggest thing being re-stamped/forged I think. I can just barely see it in one of your pics.

You can read "US" but it's not real pronounced...Joe

To me, that's a good sign of probable originality that it's not a nice clear stamp.