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https://www.kovels.com/collectors-questions/ostby-barton-co-jewelry.html
Apr 12, 2015 · Inside is a small mark, the capital letters “OB” in a rectangle with clipped corners. Can you tell me who made it? A: OB stands for Ostby & Barton Co. a jewelry firm that worked from 1880 to the 1950s. Engelhart C. Ostby was born in Norway, moved to the United States, and by 1879, had joined with Nathan B. Barton to form a jewelry company.Estimated Reading Time: 2 mins
https://www.maejeanvintage.com/blog/2016/1/25/history-of-ostby-barton-jewelry-co-the-significance-of-the-historical-titantic-collision
Apr 30, 2016 · Ostby and Barton Co., a jewelry manufacturing company, was founded in 1879 when Engelhart Cornelius Ostby and Nathan B. Barton formed their business partnership. Previous to their partnership, Mr. Ostby trained to be a jeweler at the Royal School of Art in Norway. He furthered his education and expeEstimated Reading Time: 8 mins
https://www.globalgemology.com/o.html
O. Information: O.C. Tanner Jewelry Co. was founded in 1927 by Obert Clark Tanner, in Salt Lake City, Utah. Works primarily in gold and platinum. Information: Founded in 2000 as "A V Jewelry of New York" by Avi Matatov, in New York City, and later transitioned into "Odelia Diamond Jewelry".
https://antiquesandauctionnews.net/articles/A-History-Of-The-Ostby-&-Barton-Jewelry-Co~-And-Its-Ties-To-The-Titanic/
Apr 14, 2016 · Next time you are browsing for vintage jewelry, remember to check for the Ostby & Barton (OB) mark, which indicates the piece is of high quality along with having an interesting history with historical connections.
https://www.etsy.com/market/ostby_barton
Vintage Ostby & Barton Delicate Edwardian Ring, 10k Yellow Gold with Imitation Emerald, Circa 1915. TinacityAD. 5 out of 5 stars. (133) $105.00 FREE shipping. Add to Favorites. Antique Victorian Filigree Cocktail Ring, Hard to Find Piece, Silver Plated Faux Amethyst, Size 5, Look! Must See. SuchSplendidThings.
https://community.ebay.com/t5/Archive-Jewelry-Gemstones/Ostby-amp-Barton-Gold-Ring-is-it-14K/td-p/19740868
Mar 19, 2017 · The second thread has a ring that does not have the same mark either, it's OB, but 3 crowns, a 14 and an M. Ostby Barton was from Norway. I believe that's why he also uses 3 crowns. IMO, the second ring is from Sweden (that's why there is no OB). The first ring is OB but filled gold, that's why there is an F and no karat number.
http://www.amaterracrianza.com/jewelry-makers-marks-in-alphabetical-order/
Nov 29, 2016 · Jewelry markings chart n how to read silver hallmarks steemit ask a specia what can the hallmark benjamin allen ue 1899 morning makers marks b replays and things Jewelry Makers Marks In Alphabetical Order BeautifulearthjaSilver Jewelry Marks Learn To Identify And DateHallmarks Maker S Marks Resource Antique JewelryJewelry Markings Chart…
https://thinkengraved.com/blogs/news/a-guide-to-what-jewelry-stamps-mean
Apr 29, 2021 · This is basically the maker’s mark for Pandora Jewelry. This is stamped in almost all Pandora jewelry except for maybe a few smaller pieces. What does sk9 Platnaire mean? Platnaire is an alloy consisting of 92.5% silver, 5% platinum and 2.5% other elements but is …
https://jewelry.lovetoknow.com/about-jewelry/understanding-markings-jewelry
You may notice the following metal stamps or markings on your jewelry: Marking. What It Means. A number, followed by "k" or "karat". The item is gold. The purity of the gold varies by the karat number, with "24k" being nearly solid gold and "10k" being 10/24 gold. "Gold-filled" or "GF". The piece is mostly made of base metal, but it has a sheet ...
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