EOS Canon lens Date of manufacture.

[Pierre Bellavance]

Hi,

I have just purchased a new Canon 28-135 IS Zoom Lens bearing Serial Number 
4500725F.

I would like to know when it was manufactured, but I can't decode this from 
this number with the information I have found on 
http://www.a1.nl/phomepag/markerink/eos_age.htm

Should there be another number somewhere?

Thanks

Pierre

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