biglove wrote: ↑
March 30th 2019, 4:45pm
Like the mint dial, Black bezel. Good dimensions.
yes, The minty Freediver with black bezel is refreshing. The Summiteer is a yawner.
Miyota 9039 movement? A pretty recent one according to caliber corner. https://calibercorner.com/miyota-caliber-9039/
"The Miyota caliber 9039 is a 24 jewels automatic movement that was introduced to the market in 2018. As a member of the 9000 family of movements, this caliber is part of Miyota’s Premium Automatic line. It tells the time via a standard 3 hand display with no date option. This movement is made in Japan."
And it turns out to be a variant of the 9015 which is derived from the 8215:
"The caliber 9015, which was presented for the first time in 2009, is a revolutionary development of the 8215 caliber. Equipped with a ball bearing rotor, a second stop and a date with a quick-change circuit, this new plant works very precisely with 28,800 half oscillations per hour. The range deviation is indicated as -10 to +30 seconds per day. According to experience, however, the work runs much more precisely, in some cases with a deviation in the single-digit second range. Furthermore, the movement has a shock absorber, a Swiss anchoring inhibitor and a manual hoist. The reserve is 42 hours. The movement is a technical masterpiece due to its low overall height of only 3.9 mm."
"The Miyota caliber 8215 is a 21 jewel automatic movement, first introduced in 1977. It is made in Japan and is found in many new microbrand watches because it is easily obtainable, low cost, and considered an entry level workhorse movement.
Miyota claims the caliber 8215 has an accuracy rating of -20 ~ +40 seconds per day."
The 9039 movement goes for ~$100 while it's grandfather, the 8215, can be found for $40-50, purchased singly.
Is it possible to drill down the movement genealogy tree to the original movement; like a sundial in Rome or water clock in Athens, Greece?