This is an antique (vintage) Omega watch case, tailored from red velvet and ivory silk. I purchased it from an antique shop. Approximately 25 cm x 10 cm x 2.5 cm. The spring mechanism allows the lid to stay open. I used it for a while as a jewelry case (necklace case). As a bonus, I will include the freshwater pearl necklace in the photo (clasp made of silver).