Miyota Caliber 0S20 Watch Movement Instructions

Quick Guide to Miyota 0S20

This guide provides essential operating instructions for the Miyota Caliber 0S20 watch movement. It covers basic time and date adjustments, chronograph operation, and the necessary reset procedure required after battery replacement or if the chronograph hands do not return to zero.

Displays and Buttons

The movement features a crown with three positions (Normal, 1st, and 2nd) and two buttons (A and B) to control the chronograph functions. The watch face includes a 24-hour hand, small second hand, and chronograph indicators.

Setting the Time

1. Pull the crown out to the 2nd position.
2. Turn the crown to set the hour and minute hands.
3. Push the crown back to the normal position to start the small second hand.

Setting the Date

1. Pull the crown out to the 1st position.
2. Turn the crown counter-clockwise to set the date.
3. Push the crown back to the normal position.

Note: If the date is set between approximately 9:00 PM and 1:00 AM, the date may not change correctly on the following day.

Using the Chronograph

The chronograph can measure time up to 59 minutes and 59 seconds in 1/1 second increments.

• Start/Stop: Press button A to start or stop the chronograph.
• Reset: Press button B to reset the chronograph hands to the zero position.

Chronograph Reset Procedure

Perform this procedure if the chronograph second hand does not return to the zero position after a reset or after replacing the battery.

1. Pull the crown out to the 2nd position.
2. Press button A repeatedly to advance the chronograph second hand until it reaches the zero position. Holding button A will advance the hand rapidly.
3. Once the hand is at zero, push the crown back to the normal position.

Important: Do not push the crown back to the normal position while the chronograph second hand is still moving to the zero position.