Where can I find the date code of a lens?

[mandozilla]

I've read a few times about the date code and I can't find it in my 100-400L

I've bought it on february in Switzerland. Looked in the barrel, near the front and back element :oops: ... nothing. Any hint appreciated

Thanks!

[Cathpah]

usually back on the black area between the glass and the metal mount, however sometimes they're pretty tricky to find

[kevin_c]

Don't know if you have seen this link?

http://www.the-digital-picture.com/Canon-Lenses/Canon-Lens-Aging.aspx

It may help...

[mandozilla]

Right in the black area near the mount...
UU0916 ! = Sept 2006 :-)

Thanks!