: I recently lost an older F1 chrono (blue) and
: am trying to replace it on ebay. I don't
: have the original paperwork and am confused
: by some of model number information found on
: the back of the case. I have noted the there
: seem to be two designations: CR1210-R0
: (sometimes with a serial number sometimes
: not)and 373.513. Both watches look almost
: identical. Is there a difference? Is one
: authentic and the other fake? Can anyone
: help me?
The 373.513 is an older numbering system, the other is the number they changed to.