This is a beautiful bracelet by Bvlgari in the Tubogas style. It is well crafted in 18k yellow gold and is constructed with some flexibility for easy wear. It is open in the middle with a circle of polished onyx on each side with the logo etched around it.There are five hallmarks stamped inside.
It is approximately 2.5 inches in length but is flexible to fit larger and is slightly more than a 1/4 inch wide. Tubogas translates literally to “gas pipe” and is the descriptive name given to a type of chain formed from a pair of interlocking gold strips wrapped tightly together.
This forms a flexible and hollow tubular necklace that requires no soldering. Popular during the late 1930s and 1940s, gas-pipe or tubogas reflects the innovation necessitated by the scarcity of jewelry materials during World War II.