Do all Oakley Penny's have Serial Numbers?

[Nectam]

Hello I have seen some penny with no serial numbers.

Do all Oakley Penny's have a serial number or did they make some without them?

As far as I know .... the last ones were done for the X-men movie and have serials
Pleas share your ideas

 

[freakface]

there are some pennys that did not have serials, the same way some juliets did not have serials.

 

[Typhoon]

They all had serials, except warrantee frames and the 2nd release Xmetal Ruby AFAIK.