Specifications - Seiko 8R28 Instructions Manual

Mechanical watch
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SPECIFICATIONS

1
Display system
Time/Calendar............................................. Hour, minute and small second hands
Stopwatch ................................................... Measures up to 12 hours
2
Vibrations per hour ............................................ 28,800
3
Loss/gain (daily rate) ........................................... B e t w e e n + 2 5 a n d -15 s e c o n d s a t n o r m a l
4
Continuous operating time ............................... More than approx. 45 hours
5
Driving system ................................................... Automatic winding type with manual winding
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 specified 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.
2
Date is displayed in numerals
Stopwatch hour, Stopwatch minute and Stopwatch
second hands
temperature range (between 5 °C and 35 °C or
between 41 °F and 95 °F)
mechanism

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