Ken Griffey Jr. collectors...any luck grading the 1993 Upper Deck Promos?

Sort of a re-post from another board...
I recently bought a collection of early-90's stuff - an awesome 3200 ct. box that appears to have been someone's kid's college fund, judging by the bricks of Dan McGwire, Ricky Ervins, Dave Nied, Brien Taylor, etc that I found. Actually, one of my favorite "junk" buys since I save all that "hot-in-the-early-90s" stuff. But anyway, since I'm always checking for "unmarked" promos, I lucked across a 1993 Upper Deck Griffey #355 promo.
As far as I can tell, It's only real difference is the hologram on back - it uses the 1992-dated hologram since that's when it was produced. The SCD annual lists it as 355a but I am not sure if Beckett annual mentions it. I didn't see any in the POP reports either. I know there are some die-hard Griffey guys around, so hopefully someone can give me a little info on grading these.
And by "grade", I pretty much mean, will PSA "recognize" it on the flip?
Thanks!
I recently bought a collection of early-90's stuff - an awesome 3200 ct. box that appears to have been someone's kid's college fund, judging by the bricks of Dan McGwire, Ricky Ervins, Dave Nied, Brien Taylor, etc that I found. Actually, one of my favorite "junk" buys since I save all that "hot-in-the-early-90s" stuff. But anyway, since I'm always checking for "unmarked" promos, I lucked across a 1993 Upper Deck Griffey #355 promo.
As far as I can tell, It's only real difference is the hologram on back - it uses the 1992-dated hologram since that's when it was produced. The SCD annual lists it as 355a but I am not sure if Beckett annual mentions it. I didn't see any in the POP reports either. I know there are some die-hard Griffey guys around, so hopefully someone can give me a little info on grading these.
And by "grade", I pretty much mean, will PSA "recognize" it on the flip?
Thanks!
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