Seiko 6139

 Seiko introduced its everyday chronograph in 1969.  Based partially on the 6200, it wasn’t exactly a luxury movement; however, it’s developed a cult following with certain models being highly collectible.  

A single register chronograph, with a 30 minute counter, no continuous seconds and a quickset day-date display. It remained in production until around 1979 and was produced in a wide range of dial colors and case styles.

For the true 6139 devotee, the 6139-6002 Pogue is the model everyone wants for their collection.  It has the honor of being the first automatic chronograph worn in space.