ETA 901.001 Movement

• Basic Information: It is a quartz-type movement with an analog display, manufactured by ETA. The movement has a diameter of 13 x 15.15 mm and a thickness of 2.4 mm, making it a relatively thin and lightweight movement.
• Internal Structure: The movement contains 3 jewels. Jewel bearings can reduce friction between internal components of the movement, improving its operational precision and stability.
• Battery-Related Details: It is powered by a Renata R321 (321/SR616SW) battery, with a maximum battery life of up to 132 months.
• Height Specifications: Three different height options are available, namely an overall height of 3.38 mm, 3.20 mm (HCP 0), and 3.92 mm (HCP 3).
• Functional Features: Designed with two hands, it supports hour and minute display functions. (Note: The original text about “some [features]” is incomplete; please confirm additional functions based on specific configurations in practical use.)

Key Term Notes:

• Two-Hand Design: A common watch movement layout that only includes hour and minute hands (no second hand), typically used in minimalist or ultra-thin watch styles to prioritize slimness and simplicity.
• SR616SW Battery: A common button cell battery for watches, with “321” being its industry-standard model number (Renata R321 is a specific brand variant of this battery type).