Original Post
Written by
Edited March 6, 2024
at 07:07 AM
by
Jomashop [jomashop.com] has a
SEIKO 5 Automatic Black Dial Black Rubber Men's Watch for
$134 after applying code
SE20 at checkout.
Shipping is free.
Another option:
Description
Silver-tone stainless steel case with a black rubber strap. Uni-directional rotating black PVD stainless steel bezel. Black dial with luminous hands and index hour markers. Minute markers around the outer rim.
Dial Type: Analog. Luminescent hands and markers. Day of the week and date display at the 3 o'clock position. Automatic movement. Scratch resistant hardlex crystal. Skeleton case back. Round case shape, case size: 40 mm, case thickness: 12.5 mm. Band width: 22 mm.
Tang clasp. Water resistant at 100 meters / 330 feet. Functions: date, day, hour, minute, second. Sport watch style. Watch label: Japan Movt.
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Most watches should not vary more than 5 seconds per day, otherwise, you got a lemon and need to exchange it or have it repaired.
It might be possible to adjust it if you can get a service manual and the module allows for this without a ton of extras.
Temperature + adjustments.
Let's say the watch is calibrated and adjusted at 25C, but then you're using it in a 30C environment all the time. Crystal will run at a different speed, affecting accuracy.
If the movement allows for fine tuning, you can adjust based on the typical temperature (the wrist temp) for better accuracy.
Otherwise, radio or gps watch....
Temperature + adjustments.
Let's say the watch is calibrated and adjusted at 25C, but then you're using it in a 30C environment all the time. Crystal will run at a different speed, affecting accuracy.
If the movement allows for fine tuning, you can adjust based on the typical temperature (the wrist temp) for better accuracy.
Otherwise, radio or gps watch....
Thank you for this data, but the product being discussed is not a quartz watch.
"Automatic" movements are mechanical movements which depend upon properly regulated balance springs, and these are also affected by temperature variations (like almost everything else). However, many other factors will influence the accuracy of mechanical watches, like gravity, friction and dial position (all inter-related).
Temperature + adjustments.
Let's say the watch is calibrated and adjusted at 25C, but then you're using it in a 30C environment all the time. Crystal will run at a different speed, affecting accuracy.
If the movement allows for fine tuning, you can adjust based on the typical temperature (the wrist temp) for better accuracy.
Otherwise, radio or gps watch....
No offense, but I'm a watch nut/collector. I have tons of mechanical movement watches (and a couple quartz and radio citizens). as others have said, we are discussing a mechanical watch, not quartz. 5 seconds per day would be among the BEST mechanical movements.
Mechanical movements come in grades. The higher the grade, the more STEADY they seem to be. Meaning, the same error over and over reguardless of temperature, position, etc. that's what a cosc or meta certification is telling you. In reality, for example, my planet ocean omega is +2 seconds a day almost always, no matter what happens to it. Same thing with Rolex, the same rough difference every day.
Seiko regular movements are no where near that same category. They claim about +/- 30 seconds a day, and that's probably fair. You can manually regulate them in multiple positions, and expect to maybe average +/-10. But you'll get some inconsistent days, where they are just bouncing all over. you also get some duds out of the box. That's why they are cheap.
Mechanical movements come in grades. The higher the grade, the more STEADY they seem to be. Meaning, the same error over and over reguardless of temperature, position, etc. that's what a cosc or meta certification is telling you. In reality, for example, my planet ocean omega is +2 seconds a day almost always, no matter what happens to it. Same thing with Rolex, the same rough difference every day.
Seiko regular movements are no where near that same category. They claim about +/- 30 seconds a day, and that's probably fair. You can manually regulate them in multiple positions, and expect to maybe average +/-10. But you'll get some inconsistent days, where they are just bouncing all over. you also get some duds out of the box. That's why they are cheap.
Between this and the hardlex instead of sapphire, I'm staying away from this one.
It's cheap enough, not a terrible deal....but I don't like the lack of hacking. But that's just me.
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Pop a new NH movement in there off AliX for $30. Usually that workhorse movement is great.