Up for sale is this beautiful 1986 Seiko ref. 8T23-8020 Hand Wound Quartz
 
Case Width: 35mm Excluding the crown
 
Case Thickness: 11mm including the crystal
 
Dial: Original
 
Hands: Original
 
Bezel: Base Metal

Case Back: SEIKO WATER RESISTANT - BASE METAL - ST. STEEL BACK - 8T23-8020 - JAPAN A - 600227
 
Case Material: Base Metal Coated Gun Metal Color
 
Crown: Original Base Metal Coated Gun Metal Color
 
Crystal Material: Plexi Crystal
 
Lug Width: 18mm
 
Band Material: Leather
 
Condition: In preowned condition, bezel has some hits.
 
Movement: Seiko Cal. 8T32.
 
Service History: Unknown, but in running condition.
 
Red Light: Also the light does lights up. That being said, the red light does not fully stay lit when wound, however a full charge hasn't been given. But the watch is working as it should.
 
About this piece as written on Coron.et: 
 
"The world’s first manual winding quartz movement was Seiko’s Cal. 8T32, released by Seiko in the late 1980s. The wearer would be able to wind the crown and turn a small electrical generator, which charged a capacitor.
 
This timepiece would be discontinued a year later, as it was not commercially viable due to a variety of reasons. Without going too much in depth, one of the main reasons was an astonishing 3-minute winding time for 75 hours of power reserve.
 
Though ultimately a commercial failure, Seiko can adapt and create new conceptual and physical models through an iterative learning process. Almost all innovations are the result of previous learning failures."