S. Epson Corp. Caliber YM62A

S. Epson Corp. Caliber YM62A

S. Epson Corp. Caliber YM62A

Manufacturer S. Epson Corp. (Seiko)
Caliber Number YM62A, YM62
Movement Type Quartz
Lignes 12”’ x 10.5”’
Diameter
27.6mm x 24.1mm
Thickness 3.7mm
Battery Cell Number SR927W (395)
Battery Lasts
3 years
Frequency 32,768 Hz
Quartz Type Tuning fork type quartz crystal
Stem 0351584 (0351585 long)
Hand Sizes 1.10mm / .65mm / .20mm x 3
Jewels 0
Functions Central hours, central minutes; central chronograph seconds; small seconds subdial at 9:00; 60 minute counter at 12:00; alarm subdial at 6:00; date at 3:00
Country of Manufacture Japan
Known Models Jacques Lemans F1

The Epson (Seiko) caliber YM62 is a 0 jewels quartz chronograph movement that is made in Japan. It is found in non-Seiko branded watches. Technical documentation for this movement were found dated July 2014, so it can be found in watches at least that old.

YM62 VS 7T62:

The caliber Y62A is based on the Seiko caliber 7T62. It may be a possible replacement for the 7T62, however, keep in mind that it is slightly taller.

Accuracy:

Epson claims that the accuracy of the YM62A should be within a range of +/-20 seconds per month when worn on the wrist in normal operating temperatures of -5 degrees C to + 50 degrees C (~41 – 122 F).

Crown Stem Removal:

To remove the crown and stem in your YM62A powered watch, you will need to pull the crown out one click to date setting position. Then locate the arrow with the text “Push” on the back of the movement near the crown. Gently press the detent button with your tweezers while carefully pulling out the crown/stem assembly.

Alarm Function:

The YM62A has an alarm function with an audible alarm sound. This sound is achieved thanks to an 18mm diameter piezoelectric element that is adhered to the caseback via a thermoplastic adhesive. According to Epson: “If the sticking position of piezoelectric element is drastically misaligned or if the electrical continuity is bad, no sound may occur.” There may also be a sound issue if the battery needs replaced.

To set the alarm:

  1. Pull the crown out one click to date setting position.
  2. Press the bottom chronograph pusher to advance the alarm hands.
  3. Push the crown back in when desired time is reached.

The alarm will go off in the coming 12 hours. It rings for 20 seconds. You can silence the alarm by pressing either of the chrono buttons. While the alarm is ringing, the chronograph will not work. To cancel the alarm, simply follow the alarm setting instructions above – it is the same process: crown out one click, press the bottom pusher, push the crown back in.

Resetting the Chronograph to Zero:

After a battery change you may need to reset your chronograph hand to zero. In order to achieve this, follow the steps below:

Seiko Epson Caliber Ym62a Chronograph Zero Instructions

Plastic Hour Wheel:

The YM62A contains plastic parts, specifically the hour wheel. Because of this, Epson does not recommend removing and installing the hour hand more than 5 times. The reason is because repeated removal and installation of the hand can “reduce hand fixing torque” causing the hand to not stay in its placement.

Tech Drawings:

Additional Resources:


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julet bryan
julet bryan
6 years ago

are these movements in all watches eg would i find a movement like this in an Anne Klein watch

Glenville tucker
Glenville tucker
6 years ago

Hi, I have a watch with no name on the dial,but it says seiko on the metal strap and says s.epsom corporation inside ,it is Quartz and working fine,are they worth anything?

Glen Stephenson (Dr, Clock)
Glen Stephenson (Dr, Clock)
6 years ago

Hi chasing electronic circuit for Y185 B 6 hand movement

Danielle Rihn
Danielle Rihn
5 years ago

I just found a beautiful one I will be putting up on ebay

Glen Stephenson (Dr, Clock)
Glen Stephenson (Dr, Clock)
5 years ago
Reply to  Danielle Rihn

HI Glen Stephenson (Dr.Clock) Re Danielle Rihn do you have for sale an Electronic Circuit for the Y185 B or even a complete movement If so how much Thank You Glen

vimal
vimal
5 years ago

i am looking for NX14A s.epson calibre user guide

trackback
Seiko Caliber 7T62 Watch Movement | CaliberCorner.com
4 years ago

[…] may also see a similar caliber known as the Hattori or SII YM62. The YM62 is basically the same movement as the 7T62 except that it is sold to other watch […]

trackback
Seiko Caliber 7T92 Watch Movement | CaliberCorner.com
3 years ago

[…] may also see a similar caliber known as the Hattori or SII YM62. The YM62 is basically the same movement as the 7T62 except that it is sold to other watch […]

Jef
Jef
3 years ago

Guys, i have seiko 7t62 with Ym62 machine inside. Is it fake seiko or authentic? Because i got this from my granpa

uçar yıldırım
uçar yıldırım
1 year ago

Hi so can ve say that if so Pulsar is the under seiko brands so they use the same caliber for pulsars too ?

Carlos Alvarez
Carlos Alvarez
4 months ago

I have a SEIKO with a movement YM62A is a quartz chronograph with two crowns and 3 push buttons, the crown at the 4 is missing completely no stern or crown and any of the buttons appear to work, the watch is running cause the second hand is moving, also when I pull the crown to second position to move the arms nothing happens, is any way to fix that or I need to replace… Read more »

Matthew
Matthew
2 months ago

Finally!!! I’ve been looking by my watch model and can’t ever find anything on the Fossile Blue CH2461 from 2007. Fossil clearly doesn’t support it anymore but the inner piece is a YM62A. Thank you for keeping the technical information available!

;
Venus Caliber 178

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