This vintage brooch, which is high end, is marked with an "S" or a "5". It is impossible to read and so I didn't bother with a photo of the mark. The brooch features a huge oval black opaque glass cabochon set in with a "crown" of decorative prongs. Below the large central cabochon are two rows of stones. There are larger sparkly rhinestones that have a very chic hint of the color grey. There are also black opaque navette cabochons. The setting is highly domed.
Measurements are 2 3/8 inches wide by 1 7/8 inches tall by 7/8 of an inch front to back.
The condition is excellent save for the bent pin stem which does not effect functionality.