GUEST: My father had bought it for my mother back, 1970.

In that time frame.

My father had been a, a Shriner and a Mason, and he created a lot of contacts through that.

And so he met Larry Beck, who was the trophy king of Baltimore and also a jeweler.

And he would buy his, uh, jewelry from Larry.

And so, if there was things that Larry Beck thought my father would be interested in, he would call him and have him come out and take a look, which is how I'm pretty sure this watch came to be.

Um, my mother used to wear it as a pin when she would go out to dance or dinner.

APPRAISER: Is there another piece to it, then, that made it a pin?

GUEST: There used to be another piece, but it wasn't part of the watch.

And two jewelers had offered me $2,000 for that.

APPRAISER: Okay.

GUEST: And I just wasn't ready to sell it at that point.

I just felt like there was something more to that watch than what they were saying.

APPRAISER: Do you have any idea how much your dad paid for the watch?

GUEST: I do not, no.

I mean, I was, I was a kid.

APPRAISER: So your dad sort of hit the trifecta when he caught the watch.

The watch is platinum, it's made by Patek Philippe, and it was retailed by Tiffany.

Tiffany was the first company in the United States to become an authorized franchise agent for Patek.

So, Patek-Tiffanies are steeped in American history in watchmaking.

The watch was made circa 1910.

And we can tell that from the serial number that is on the movement.

The case and all the diamond work was all done in France.

It's an 18-jewel movement.

It's encrusted with diamonds.

So here's the face of the watch, which is Tiffany and Company.

Diamonds are going all around.

And then, to open up the watch, we take off this part of the case.

And this is the inside cuvette, or dust cover.

GUEST: Okay.

APPRAISER: And what you see is white enamel.

And on the other side, you see the high-karat, 18-karat yellow gold.

On the back is a case number, is a hallmark, which is a French duty mark.

Now, the movement is also signed Patek Philippe, 18 jewel, and a serial number, and also has the marking "Tiffany and Company."

Tiffany sold other brands of watches, Patek being the Rolls-Royce, the finest that they did.

They, they had five or six different lines that they used.

A lot of the Tiffany watches are unsigned on the movement, meaning that you don't know who made it.

It was just retailed by Tiffany.

But with the franchise agreement that Patek had with Tiffany, it's signed on the movement, which brings it to a whole 'nother level.

In today's market, at a retail level, this watch would be in the $13,000 to $15,000 price range.

It's an absolute extraordinary example of a Tiffany Patek.

GUEST: Wow.

APPRAISER: Congratulations!

GUEST: Thank you!

(laughing): Oh, my goodness.

Now I know.