757424

Seiko 8R39 Manual

14
Zoom out
Zoom in
Previous page
1/14
Next page
English
27
English
26
ACCURACY OF MECHANICAL WATCHES
● The accuracy of mechanical watches is indicated by the daily rates of one week
or so.
● The accuracy of mechanical watches may not fall within the specified range of
time accuracy because of loss/gain changes due to the conditions of use, such as
the length of time during which the watch is worn on the wrist, arm movement,
whether the mainspring is wound up fully or not, etc.
● The key components in mechanical watches are made of metals which expand
or contract depending on temperatures due to metal properties. This exerts an
effect on the accuracy of the watches. Mechanical watches tend to lose time at
high temperatures while they tend to gain time at low temperatures.
● In order to improve accuracy, it is important to regularly supply energy to the
balance that controls the speed of the gears. The driving force of the mainspring
that powers mechanical watches varies between when it is fully wound and
immediately before it is unwound. As the mainspring unwinds, the force
weakens.
Relatively steady accuracy can be obtained by wearing the watch on the wrist
frequently for the self-winding type and winding up the mainspring fully everyday
at a fixed time to move it regularly for the wind-up mechanical type.
● When affected by strong external magnetism, a mechanical watch may loss/gain
time temporarily. The parts of the watch may become magnetized depending on
the extent of the effect. In such a case, consult the retailer from whom the watch
was purchased since the watch requires repair, including demagnetizing.
SPECIFICATIONS
1 Display system
Time/Calendar ............................................. Hour, minute and small second hands
Date is displayed in numerals
Stopwatch ................................................... Measures up to 12 hours
Stopwatch hour, Stopwatch minute and Stopwatch
second hands
2 Vibrations per hour............................................. 28,800
3 Loss/gain(dailyrate) ........................................... Between +25 and -15 seconds at normal
temperature range (between 5 °C and 35 °C or
between41°Fand95°F)
4 Continuous operating time ............................... More than approx. 45 hours
5 Driving system ................................................... Automatic winding type with manual winding
mechanism
6 Number of jewels...............................................34jewels
• The accuracy above is factory adjusted.
• Duetothecharacteristicsofmechanicalwatches,anyactualdailyratemaynotfallwithintherangeof
timeaccuracyspeciedabovedependentontheconditionsofuse,suchasthelengthoftimeduring
which the watch is worn on the wrist, temperature, arm movement, and whether the mainspring is
wound up fully or not, etc.
… 14


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Seiko 8R39 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Seiko 8R39 in the language / languages: English as an attachment in your email.

The manual is 1,06 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Seiko 8R39

Seiko 8R39 User Manual - German - 13 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info