6217-8001, 1967


6215-7000, 1967


6159-7000, 1968

 

5606-7060, 1968

5606_7060

lmbrclt
5606-7060, 1968

Seiko Quartz Astron 35SQ – Worlds First Quartz Watch, 1969

In the latter half of the 1950s watchmakers were vying to outdo one another in the area of wristwatch accuracy. So it was, in 1959, that Epson launched the “59A Project,” a program to develop a next-generation, high-accuracy, battery-operated wristwatch. The project team members researched several types of battery-operated watch structure — spring balance, tuning fork and quartz. Eventually, however, they began to concentrate on the target of developing a quartz timepiece in a transportable size. This happened to coincide with a program to develop an official timekeeping device for the Tokyo Olympic Games, and synergies between the two programs helped to accelerate that research, leading to the development of the Seiko Crystal Chronometer QC-951. Meanwhile, the company announced in 1966 that it had developed a pocket-watch style quartz prototype. The following year, it announced the development of a prototype quartz wristwatch. The prototypes came away from the prestigious Neuchatel Observatory chronometer contest, winners. Finally, in 1969, came the commercialization of the world’s first quartz watch, the Seiko Quartz Astron 35SQ.

  • Center second: One step per second
  • Outer diameter 30.00 mm T
  • Thickness 5.30 mm (battery unit 6.10 mm)
  • Driving method: Crystal oscillation circuit controlled stepping motor
  • Vibration frequency: 8.192 Hz
  • Accuracy: Room temperature (+4°C to +36°C)
    Daily rate ±0.2 sec
    Monthly rate: ±5 sec.
  • Battery life: 1 year or longer
  • Jewels: 8
  • Price: ¥450,000 (18-karat solid gold case)

Source: Seiko Epson, Astron pdf


This slideshow requires JavaScript.


7016-8000, 1972


0614-5000, 1973

13687421_1094938143907684_51573519_n
0614-5000

6139-6002, 1975


6138-8020, 1976

19985587_102990250367434_5225895255475224576_n
6138-8020
DSC_8918-01
6138-8020

QGA020, 9983-7000, 1979

19120774_1786669891593963_687104263809138688_n
QGA020 / 9983-7000
19120555_143451192871461_6238420481108606976_n
QGA020 / 9983-7000

7C43-7010, 1989


SBWA002, 7R68, 1999


SDGA001, E-Ink, 2010


SPS005, 5R86, Space Walk, 2010

This slideshow requires JavaScript.


SKX009J, 7S26, 2014


SBDC027, 6R15, 2015


SBDX014, 8L35, 2015


SBDX017, 8L35, 2015


SBEX003, 8L55, 2016


SRPA21, PADI, 2016


SLA017, 8L35, 2017

This slideshow requires JavaScript.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s