All Categories
Advertising
Alcohol & Smoking
Antiquities
Books, Paper & Magazines
Ceramics
Coins & Currency
Entertainment
Ethnic, Folk & Native American Art
Fine Art
Firearms and Accessories
Fraternal, Political, Organizations
Furniture & Furnishings
Glass
Jewelry
Metals
Militaria & Weapons
Natural History
Sports
Stamps
Textiles, Clothing & Accessories
Tools
Toys, Dolls, Games & Puzzles
Transportation and Vehicles
Log In
Try for free
All Categories
Advertising
Alcohol & Smoking
Antiquities
Books, Paper & Magazines
Ceramics
Coins & Currency
Entertainment
Ethnic, Folk & Native American Art
Fine Art
Firearms and Accessories
Fraternal, Political, Organizations
Furniture & Furnishings
Glass
Jewelry
Metals
Militaria & Weapons
Natural History
Sports
Stamps
Textiles, Clothing & Accessories
Tools
Toys, Dolls, Games & Puzzles
Transportation and Vehicles
Log In
Try for free
Price Guide
Marks
Library
Dictionary
Vault
Live Partner Auctions
Live Auction Events
Live Auction Items
Our Industry Partners
Blog
Articles
WorthPoint Media
Newsletter Signup
WorthPoint Indices
Price Guide
Marks
Library
Dictionary
Vault
Live Partner Auctions
Live Auction Events
Live Auction Items
Our Industry Partners
Blog
Articles
WorthPoint Media
Newsletter Signup
WorthPoint Indices
Save to favorites
Please login to save your item as a favorite.
Continue
Home
>
Marks
>
Jewelry
Mark with Number 18 and letters K CO. | #188456
Start Free Trial
or
Sign In
to see mark details.
Category:
Jewelry
Classification:
...
Full company name:
...
Company location:
...
Company dates:
...
Successor Company:
...
Dates of use:
...
Description:
Number 18 and letters K CO.
Material:
...
Application:
...
Color:
...
Notes:
...
Keywords:
18
k
co
Contributor:
...
Live Lots
Discover and Bid on Current Inventory Available from Our Industry Partners
(results based on your current search)
Relevant Jewelry Articles
April 7, 2025
by Pamela Siegel
Is the Brooch Back in Style?
April 3, 2025
by Will Seippel
Insights on Auction Sales: Diamond Ring, Wild Black Cherry Bed
by Pamela Siegel
The Everlasting Charm of Easter Jewelry
