GUEST: I own a school building in Waldoboro, Maine, and we've been renovating the building, turning it into a creative compound.

And as the guys were doing demo in the ceiling, they found a whole bunch of alcohol bottles and these beer cans.

They almost kind of threw them all away.

I'm like, "Oh, these look so cool."

They're super graphic.

APPRAISER: In the world of breweriana, these are actually very important cans.

This is called a cone top can.

GUEST: Mm.

APPRAISER: And it was available as both a 12-ounce and a quart size.

And the cone top just specifically relates to the form in which you would drink the beverage.

The cone top can was first introduced in 1935 and it was phased out by 1960.

When we look at the side of the can, we can see the full company mark here.

"The Croft Brewing Company, Boston, Massachusetts."

The company first opened in 1934 and they were closed by 1952 when they were bought out by the Narragansett Company.

They were part of that post-Prohibition boom.

GUEST: Mm.

APPRAISER: Alcohol is now legal again, so money's flowing, and people want to open breweries.

And this is their stock ale.

They had a cream ale, they had an all-malt red label.

But for collectors today, the Stock Ale can graphically is very attractive as it hones into Art Deco design.

When it comes to beer can collecting, one of the first major factors is, is it an indoor can or is it an outdoor can?

Literally meaning, did you discover these beer cans in the ground covered in dirt, or did you find them inside?

You clearly found them inside.

The lithography is vibrant.

There's minimal oxidation to the tops of them.

When we look at the can closest to me, it has the biggest apology out of them all.

Has a large dent with a crease.

Also a scratch here with some paint loss.

Otherwise, they all have little apologies.

But, they're 80-year-old-plus cans.

So, you would have a scratch or a nick too, along the way.

To find cans in this condition is exceptionally rare.

GUEST: Mm.

APPRAISER: And with exceptional condition comes exceptional jumps in value.

Conservatively, at auction, for the group of four cans, it would easily be $10,000 to $15,000 for the collection.

GUEST: Oh, wow.

Amazing.

Oh!

That could help pay for the renovation.

APPRAISER: (laughs) GUEST: It's amazing.

Oh, wow.

Too bad there wasn't one that still had beer in it.

(laughs) APPRAISER: Most recently at auction, one exceptional condition comparable to these, but had the original cap... GUEST: Mm.

APPRAISER: ...in a quart size, brought over $18,000 at auction.

GUEST: Oh, wow.

Amazing.

APPRAISER: So, surprised?

GUEST: Yeah!

So crazy.

I thought it was gonna be like, I don't know, like $100