The Miyota caliber JS06 is a quartz chronograph watch movement. It is made in Japan and has 0 jewels.
JS06 VS JS05:
Searching for JS06 leads to information on caliber JS05. Even using the search function on Miyota‘s official site redirects JS06 to JS05 documentation. This is because the caliber JS06 is essentially the same as JS05, with the main difference being that it is the “high hand” version. According to the tech drawings, the JS06 hand stack sits higher than the JS05 (1.8mm/.45mm/.40mm vs 1.25mm/.45mm/.40mm for the central hands and 1.35mm vs .8mm for the small hands). This extended canon pinion allows for multi-layered or multi-leveled dial designs and the use of deeper inner bezels. For example, the movement shown above was found in a Vostok-Europe N1 Rocket Chrono watch, while it doesn’t have a multi-layer dial, it does have a rather thick crystal and a deep inner tachymeter bezel.
Miyota claims the accuracy of this movement to be +/-20 seconds/month when used under “normal” circumstances.
According to Miyota, the correct SR621SW (364) battery cell should last about 2 years. This is based on using the chronograph for 30 minutes or less per day. It’s important to note that running the chronograph means the watch is working harder and this reduces the battery life. It’s advised to only use the chronograph when you need it. If you are not going to wear your watch for a while and want to save the battery, pulling out the stem (aka hacking the movement) will reduce the battery consumption.
Resetting the Chronograph Hand to Zero:
If your chronograph hand is not resetting to 12:00 or “zero” position, then you can try the following steps:
Pull the crown to position 2 (time setting position).
Press button A to advance the chronograph hand forward until it is lined up with 12:00. If you long-press A, the hand will move forward faster.
Push the crown back to position 0
Note: You can only adjust the chronograph/stopwatch second hand since the chronograph minute hand (subdial at 10:00) is synchronized with the seconds. The subdial at 2:00 is the 24 hour hand and does not return to 12:00 unless it’s actually 12:00.
The average individual movement replacement price at the time of this post was from $19.95 – $24.95.
If you are a watch brand looking to order the Miyota JS06, the minimum required order is 1,000 pieces. This may be negotiable, but unless you are looking for a large production run, you may want to purchase the movements from a third party. Lead time for production from Miyota is approximately 2 months
The Miyota JS60 found in a Vostok Europe N1 Chronograph watch: