If you've ever turned over a gold ring or bracelet and spotted a tiny number stamped inside, you're looking at a hallmark and one of the most common you'll find on vintage British jewellery is 375.
What does 375 mean?
The number 375 refers to the gold purity of the piece. It means the jewellery is made from 9 carat gold, which contains 37.5% pure gold hence the stamp. The remaining 62.5% is made up of other metals such as silver, copper, or zinc, which add strength and durability.
Why is 9ct gold so common in vintage jewellery?
9 carat gold has been the most widely used gold standard in British jewellery for over a century. Its durability makes it ideal for everyday wear, and its warm, rich tone has made it a favourite for rings, earrings, pendants, and bracelets across every era of jewellery design.
How to read other gold hallmarks
Not all gold is the same. Here's a quick guide to the most common hallmarks you'll encounter:
- 375 — 9 carat gold (37.5% pure gold)
- 585 — 14 carat gold (58.5% pure gold)
- 750 — 18 carat gold (75% pure gold)
- 916 — 22 carat gold (91.6% pure gold)
- 999 — 24 carat gold (99.9% pure gold)
The higher the number, the purer it is and typically the more valuable.
Why we named our store 375 Vintage
At 375 Vintage, we specialise in handpicked vintage and antique jewellery. The 375 hallmark represents everything we stand for: honest, quality jewellery with real history and character. Every piece in our collection is carefully selected for its craftsmanship, condition, and timeless appeal.
Browse our collection of gold rings and discover your next treasured piece.