Yes, Dave, LOL. This go round I'm asking about marketing names. :-)
Carole, funny you should mention Acme Realers.
I've been wondering if that might be one of the tweener marble names. And if maybe the packaging was used for two different kinds of marbles. First patches and then rainbos like you say.
In this 1933 ad, I think the Acme "Real" marbles were patches.
Yet Block called Realers rainbos, and so does the info and history page at Peltiermarbles.com:
Edit: Marble Alan also said Realers were rainbos, but a different type: "Rainbos with a translucent colored base are called Acme Realers."
I know I've seen a pic of a Realers box with patches. But I'm pretty sure I've also seen one with Rainbos.
Maybe later in the 1930's or in the 1940's Peltier said something like, "We have the boxes and we like the name so why should we mark it out? Just decide which of our new style Rainbos matches the old name best and they'll be our new Realers."
I'll see if I can find that Realers box with the Rainbos in it.