JACK MASON JM-D303-001 Strat-o-Timer Automatic GMT 40mm Watch Instructions

: June 13, 2024
: JACK MASON

Table of Contents

JACK MASON JM-D303-001 Strat-o-Timer Automatic GMT 40mm Watch
Product Usage Instructions
Adjusting the Local Hour (When Traveling)

JACK MASON JM-D303-001 Strat-o-Timer Automatic GMT 40mm Watch

JACK MASON-JM-D303-001-Strat-o-Timer-Automatic-GMT-40mm-Watch-
PRODUCT

Product Information

Product Name: STRAT-O-TIMER Automatic GMT 40mm
Model Number: JM-D303-001
Movement: Miyota Caliber No. 9075 with GMT Function

Features:

Hour, minute, and second hands
Date window
24-hour GMT hand
Manual winding
Water resistance up to 200 meters

Product Usage Instructions

Getting Started

To start the watch, manually wind it first.
Unscrew the crown in a counterclockwise direction until it pops out.
In the Normal Position, turn the crown clockwise for at least 25 turns to partially wind the watch.

Setting the Reference Time

The reference time is your home time in your respective timezone.
Pull the crown out to position 2. The second hand will stop.
Set the 24-Hour hand to the proper reference time. Ensure that the bezel is in the neutral position with the 24 at the 12:00 position.
The hour hand will also move, but you can ignore it for now as it will be set later.
After adjusting the time, push the crown back in and screw it tightly to ensure water resistance. Push the crown to the 0 or normal position, apply slight pressure, and rotate clockwise to seal it closed.

Setting the Date

Pull the crown out to position 1. Be careful not to pull it to position 2.
Turn the crown in either direction to change the date. The date changes after the hour hand completes two rotations around the dial, indicating 24 hours.
Once the date is set, proceed to set the local hour hand.

Setting the Local Hour Hand

Pull the crown out to position 1. Be careful not to pull it to position 2.
Set the hour hand to the timezone you are currently in. The hour hand moves in 1-hour increments, so pay attention to am/pm.
After adjusting the time, push the crown back in and screw it tightly to ensure water resistance. Push the crown to the 0 or normal position, apply slight pressure, and rotate clockwise to seal it closed.

Adjusting the Local Hour (When Traveling)

When traveling to another timezone, pull the crown out to position 1. Be careful not to pull it to position 2.
Set the hour hand to the timezone you are currently in. The hour hand moves in 1-hour increments, so pay attention to am/pm.
The 24-Hour hand will remain in place to keep track of your home time.
After adjusting the time, push the crown back in and screw it tightly to ensure water resistance. Push the crown to the 0 or normal position, apply slight pressure, and rotate clockwise to seal it closed.

STRAT-O-TIMER
Automatic GMT 40mm
JM-D303-001

GMT Function

Miyota Caliber No. 9075 GMT Function

JACK MASON-JM-D303-001-Strat-o-Timer-Automatic-GMT-40mm-
Watch-1

INSTRUCTION

Manual Winding

To get the watch started, you will need to manually wind the watch first.
Unscrew the crown counter clockwise until the crown pops out.
In the Normal Position, turn the crown clockwise for a minimum of 25 turns for a partial wind prior to setting the time.

Setting The Reference Time

The reference time is your home time in your respective timezone.
Pull the crown out to position 2. The second hand will stop. Set the 24-Hour hand to the proper reference time. Make sure the bezel is in the neutral position with the 24 at the 12:00 position.
The hour hand will also move, but this can be ignored for now as we will set it later.

When finished with adjusting time, always be sure to push the crown back in and screw it back in place to ensure water resistance. To make sure of this, push the crown back to the 0 or normal position, apply a little pressure on the crown and rotate clockwise to seal it closed.

Setting The Date

Pull the crown out to position 1. It is a very subtle click so be careful to ensure you are not pulling it to position 2
Turn the crown in either direction to jump the hour hand forwards or backwards.
As the hour hand crosses midnight in either direction the date will change. The date changes after the hour hand rotates twice around the dial indicating 24 hrs.
After the date has been set, it’s time to set the local hour hand.

Setting The Local Hour Hand

Pull the crown out to position 1. It is a very subtle click so be careful to ensure you are not pulling it to position 2
Set the hour hand to whichever timezone you are actively in. The hour hand jumps in 1 hour increments so be sure you are paying attention to am/pm.
When finished with adjusting time, always be sure to push the crown back in and screw it back in place to ensure water resistance. To make sure of this, push the crown back to the 0 or normal position, apply a little pressure on the crown and rotate clockwise to seal it closed.

Adjusting The Local Hour (When Traveling)

When you travel and land in another timezone you will need to adjust the local time. Pull the crown out to position 1. It is a very subtle click so be careful to ensure you are not pulling it to position 2.
Set the hour hand to whichever timezone you are actively in. The hour hand jumps in 1 hour increments so be sure you are paying attention to am/pm. In this example the local time needs to be adjusted to San Francisco time, which is 2 hours behind Dallas time. As you adjust the hour hand, the 24-Hr hand will remain in place as it continues to keep track of your home time.
When ﬁnished with adjusting time, always be sure to push the crown back in and screw it back in place to ensure water resistance. To make sure of this, push the crown back to the 0 or normal position, apply a little pressure on the crown and rotate clockwise to seal it closed.

Tracking a 3rd Timezone

You can also keep track of a 3rd timezone utilizing the rotating bezel.
If you know the time difference between your Home Time and the 3rd timezone you’d like to track, simply turn the bezel so the 24-hr hand is pointing at the appropriate hour indicated on the bezel. In this example, the time in London is +6 hours from Dallas time. To refer back to your Home Time, simply rotate the bezel to the neutral position with the 24 at the 12:00 position.