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This?
F5867AF7-4862-49F1-93DD-82EFB4804B02.jpeg
 
I have the same cheetah pair, but has jacket and made in USA on the inside stems. Does this mean, it’s a gen 2 with the new formula?

Thx
 
I swear I read in a comment on this forum, the original EJ (box stems) had 2 iterations: no stamp (like the previous poster) and stamp (like mine). The stamped versions, used the new formula = less brittle.

Any experts confirm?

D5C102F3-B8C0-4853-B3BA-5967B860C8EC.jpeg


0F56A5A4-AF02-41E2-B505-4166EE3AA215.jpeg
 
I swear I read in a comment on this forum, the original EJ (box stems) had 2 iterations: no stamp (like the previous poster) and stamp (like mine). The stamped versions, used the new formula = less brittle.

Any experts confirm?

View attachment 913114

View attachment 913115

All EJs with the squares hinges were old O matter

NEJ were the first ones to have the newer O matter
 
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