C. CO
- Maker
- Coleman Company attributed, not confirmed
- Struck in
- South Dakota, USA attributed, not confirmed
- In use
- 1984–2017 attributed, not confirmed
- Recorded on
- 1 piece
The "C. CO" (often preceded by a copyright symbol as "© C. CO.") stamp is the maker's mark used by the Coleman Company, a well-known manufacturer of Black Hills Gold jewelry based in South Dakota. The company produced traditional tri-color gold and mixed-metal jewelry from 1984 until its closure in 2017.
Pieces stamped with this mark typically feature the classic Black Hills motif: grape leaf clusters, vines, and roses cast in subtle green and rose/pink gold alloys. The maker's mark is commonly accompanied by a dual-metal purity stamp, such as "STER 12K" or standard gold stamps like "10K" or "14K", indicating a sterling silver foundation paired with solid 12-karat gold leaf appliques.
When identifying this stamp on the inner shank of a ring or the reverse of a pendant, take care not to confuse "C. CO" with similar marks from competing Black Hills manufacturers, notably "L. CO." (Landstrom's Company).
Previously sold with this mark
Kept on the record — a maker's back catalogue is most of the evidence that a mark is what we say it is.
What this entry is based on
- one piece carrying this mark, handled and photographed by this shop Written with the piece in hand. No published hallmark reference covers most of these marks.
Nothing outside this shop has been checked for this mark yet. What is above comes from the pieces themselves and from what was written while they were in hand.
Know something we don't about this mark? Tell us — corrections from collectors are how a reference like this gets better.