2024 New Product: The most challenging blue balloon color ever made. A brand new four-piece set, featuring a separated shell and bezel, with new details that outshine ordinary electroplated half models on the market. 33mm diameter blue balloon with a new structure for the separated shell and bezel. New bottom cover and AU logo. Sapphire crystal with blue steel hands. Original blue spinel made from the same material, ensuring every accessory is interchangeable with genuine parts. Original folding clasp and imported fully automatic mechanical movement.