GUEST: It was given to me by my aunt, who was 93 years old when she gave it to me.

And she had received it from her aunt when she was probably in her mid-20s, in Ohio.

APPRAISER: What you have here is a really exciting piece of Roseville pottery.

It's an experimental piece of Roseville pottery.

And for people who collect Roseville, experimental is great.

Roseville, which was such a large company, started out in Roseville and then moved to Zanesville, Ohio.

APPRAISER: Now, when I picked this up, I recognized the feel of it.

The clay body and the line of this blank they did most of their experimental works with, which is called Rosecraft Vintage, and it was introduced in 1925.

But this decoration here is probably unique.

This glaze color is highly unusual.

And this whole bacchanal scene-- which is, by the way, pretty racy-- is not on any other pot of theirs.

And the reason they did not produce this piece... GUEST: Mm-hmm.

APPRAISER: It may have been too complicated... GUEST: Okay.

APPRAISER: ...too many colors, who knows, or perhaps the dancing naked ladies?

APPRAISER: That may have been a problem for some.

GUEST: Okay.

APPRAISER: This one, being experimental, is probably all hand-carved.

APPRAISER: Which you don't see in regular Roseville, which is molded.

Part of the fun thing of finding an experimental piece is when you see on the bottom, instead of a signature, you see all the glaze numbering.

They very carefully describe where specific glazes will go.

So this is fabulous.

GUEST: Oh!

APPRAISER: There are fewer Roseville collectors today than there used to be 20 years ago.

A very conservative amount at auction is $3,500 to $4,500.

GUEST: Oh, wow.

APPRAISER: A good insurance value, probably in the $5,000 to $6,000 range.

GUEST: Oh, wonderful.