GUEST: This is a hand drawing of Einstein's hands.

It was actually signed by Einstein down here.

My mom got this at auction probably 25 to 30 years ago she got it; all that she told us about it, it was just a, a random person that, uh, that had sent the picture to him, apparently, to get this signed.

We don't know what she paid for it.

I can't imagine that she would spend more than a couple hundred dollars on this.

APPRAISER: We turned it around, we saw a label on the back, realized it was Josef Scharl, who was a German artist, contemporary of Einstein.

Einstein had met him in the '20s.

Scharl being a German expressionist, he was eventually banned from painting and drawing by the Nazis, so he couldn't exhibit there.

He had an opportunity to ex-- to exhibit in 1939 in the U.S.

He took that opportunity to emigrate, and Einstein was his guarantor.

And through the years, they got together and Scharl would paint portraits of Einstein and do drawings.

I'd not seen another one... like this.

This is dated July of 1950 in Princeton.

It's pencil on paper.

Signed by Scharl on the right and Einstein under the date.

So, it looks like Einstein signed two years after the portrait, which... ...that's a mystery, why he would've signed it after, but it's clearly his signature.

Just a signed item by Einstein, say a printed portrait or something like that, maybe it would be a $4,000 to $6,000 piece.

But this, with the association, the subject matter, it's, like, Einstein in contemplation, really, through his hands.

I think it makes it special.

I would estimate this to sell at auction for $15,000 to $20,000.

GUEST: I mean... ...that, that's amazing.

It's not going anywhere.

This is Mom's piece.

She loved this piece, and it's not going anywhere, but that's just amazing to know.

It's fantastic.

When I would go to her house, we would watch TV.

This was the thing we could always agree on, is to watch ANTIQUES ROADSHOW.

(chuckles) So, she would have loved to know that, that we're here.