Also see:
The CGC cert range 
1401042679001 - 1401042679151 include all 151 “Beta” test cards. These were all recently listed by Alt, see the Mew below.
I have compiled all the images together for your viewing pleasure. Enjoy.
Interesting to see. One thing I’ve noticed:
Also, I’m really impressed/not impressed by how the artwork between this and the final base set didn’t change. Most of the artwork is the same, with the exception of the CGI backgrounds that were inserted later.
Interesting to see what art changed and what stayed the same. And that most of the ones that did change were used eventually.
Also why you gotta do Kabuto and Kabutops dirty like that?
Sad that we didn’t get this Omanyte on a card. 
XD 
Not sure if it’s exciting or frustrating to see these show up, as others i would at least love to see more proof that these are indeed real and from official source. And if they are real they are kind of bittersweet ones since even though i would love to add grimer and muk in my collection as big historical steps for pokemon tcg but there’s no way i can purchase at least them both. Grimer i could buy if i postpone the cosmos foil fossil muk in distant future but at least now the uncertainty that covers them is a red flag for me, also i’m not sure if i could truly enjoy only one of them when i know other one also exists and it’s out of reach for me. Nevertheless cool to see them all together in a gallery like this, even if the pristine graded copies are kinda cringe ones when thinking how they are made
Very cool! Also they better not add these to any PSA/CGC master sets haha
Man I love the classic Sugimori art, so good
My boy. Maybe I could proxy him. Interesting that his number is wrong, copied from Tauros. He shares being incorrectly numbered with Charizard, growlithe, and machoke
You can proxy a proxy, haha. It’s the same art as Gym Eevee, so not too worried about it
Very cool. I’d like to see one in person. Not sure how the card mount really looks since scans don’t show anything 3d very clearly
Such a shame, as I would have been a potential buyer of some of these. I love Sugimori’s watercolor art. These are, in my opinion, permanently tainted by greed and secrecy.
The price tag on these are absolutely ridiculous imo.
An average grade of 9.5. A few pristines.
Playtest cards from 1995, likely unsleeved, and shuffled a few times- not even a single corner dent. Even from a trusted source, I’d do some due diligence here.
Unfortunately all of them are blurry.
This is one of the discoveries of all time
I wonder how I would’ve felt about these 10 years ago.
True it’s funny that that didn’t come back for a bit
Look no further than the pristine pinsir to see how rubbish it is that these are being graded rather than just authenticated.
That card is clearly bottom heavy, and not perfectly centered. Is that supposed to be how they are designed? Or did it just happen that they came out this way since they were just prototypes? Did CGC decide this specific centering was the gold standard for the rest of the set and compared all the other cards to this one? If not, how were they referencing centering???
