The Hamilton Jazzmaster Open Heart Auto is a stylish timepiece featuring a 40 mm wide stainless steel case and a height of 11.1 mm. Designed to withstand water exposure up to 50 metres, it boasts a sapphire crystal with an anti-reflective layer for enhanced visibility. The transparent case back allows a clear view of the inner workings of the watch.

Its dial showcases a soft, silver sunray finish that gently transitions to a darker hue at the edges. Prominently, the open-heart design characteristic of this collection offers a glimpse of the balance assembly and the automatic movement inside. The applied hour markers and hands are coated with Super-LumiNova, ensuring visibility in dim lighting. At its core lies the Hamilton H-10 automatic calibre, which operates at 28,800 vibrations per hour and has an impressive power reserve of up to 80 hours. Additionally, the movement features a Nivachron balance spring that enhances resistance to magnetic fields, fluctuations in temperature, and shocks. Completing the look is a brown leather strap fastened with a pin buckle.