![Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/06/Seiko-Sports-100-Titanium-7A28-7060-watch-29.jpg)
Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch
![Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/06/Seiko-Sports-100-Titanium-7A28-7060-watch-11.jpg)
Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch
![Seiko | The First Quartz Watch | The First GPS Solar Clock | The First Titanium Case Dive Watch | Astron Seiko | The First Quartz Watch | The First GPS Solar Clock | The First Titanium Case Dive Watch | Astron](https://www.horobox.com/Cms_Data/Contents/SampleBusinessEN/Media/Haberler/seiko-history-kapak.jpg)
Seiko | The First Quartz Watch | The First GPS Solar Clock | The First Titanium Case Dive Watch | Astron
![The 1983 Seiko synchrotimer, reference #7a287039. The first analog quartz chronograph, and the first analog chronograph to have sub seconds dial. : r/ Seiko The 1983 Seiko synchrotimer, reference #7a287039. The first analog quartz chronograph, and the first analog chronograph to have sub seconds dial. : r/ Seiko](https://i.redd.it/c3ciqnokigx21.jpg)
The 1983 Seiko synchrotimer, reference #7a287039. The first analog quartz chronograph, and the first analog chronograph to have sub seconds dial. : r/ Seiko
![Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/06/Seiko-Sports-100-Titanium-7A28-7060-watch-4.jpg)
Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch
![Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/06/Seiko-Sports-100-Titanium-7A28-7060-watch-31.jpg)
Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch
![Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch Seiko Sports 100 7A28 "First Analog Quartz Chronograph Movement" Vintage Watch Hands-On | aBlogtoWatch](https://www.ablogtowatch.com/wp-content/uploads/2017/06/Seiko-Sports-100-Titanium-7A28-7060-watch-5.jpg)