Help! No sure if this is a Transitional?

[Parmcat]

I can't tell if this is a badly pinched pontil.  It's not a colour I have seen in transitionals.  Is it a Cork?

Help!

[I'llhavethat1]

Yes, a less common color combo

[Fire1981]

HTF yellow Cork. Akro made very few of these because they thought they wouldn't be popular🔥

RAR

[akroorka]

Yellow on white corkscrews have been a nemesis of mine for many years. First of all they are rare, second of all they come in a variety of glass, the white especially.
They have been one of the hardest to match for a row of ten in my humble experience.
Just a nice find—find nine more like it—matching the glow and the yellow at the same time. They may seem simple to the untrained eye—they just pass the gambit—rare and hard to match,
This is collecting for me—finding ten to make a row to fill a 100 count box.
These  qualify as very hard to match inho.
I just love this stuff---simple marbles—just not so simple. My boxes will be all the same in rows and I insist on it.
Marble—On!!