A couple years ago I thought I might have a Magee batting Sweet Caporal card with a factory designation (30) that doesn't exist in the 350-460 series, which kinda got me mildly excited.
http://www.net54baseball.com/showthr...highlight=t206
Turns out the consensus here believed that it was missing the factory 42 overstrike. So honest overexcitement when thinking you might have something considered impossible is definitely excusable, as I was quickly willing to excuse myself, and dagnab it I am willing to do so now for others.
Brian