Certina Argonaut Chronograph
The other Chrono
Beside the three-hand version of the Argonaut, there were also some chronographs with this designation in the program. The reference 8401 001 with two, and the reference 8501 001 with three sub dials had the same strikingly edged case.
Additionally a 200m waterproof diver version was available. All versions had no date indication.
The used calibers were the hand winded Valjoux 23 and 726. Unlike the better known Chronolympic Chronographs, the Argonaut Chronos were produced relatively short-time, between 1968 to 1972. From the reference 8401 001 there was an identical model (with the same reference number) but with the marking "Timer" on the black dial. Also an almost identical version of the reference 8501 001 but whitout model-name on the dial seemed to be available.
Overview
| Model | Reference no. | Calibre | Dimensions mm | Comments | |
|---|---|---|---|---|---|
 | Argonaut Chrono | 8401 001 | Certina 29-053 Valjoux 23 | 38 x 42 x 12 | Manual wind. No Date Black dial with two white sub dials at 3 and 6 Identical model with name "Timer" About from 1968 to 1972 |
 | Argonaut Chrono | 8401 001 | Certina 29-053 Valjoux 23 | 38 x 42 x 12 | Manual wind. No Date White dial with two black sub dials at 3 and 6 Black tachymeter scale About from 1968 to 1972 |
 | Argonaut Chrono | 8401 501 | Certina 29-063 Valjoux 236 | 38 x 42 x 12 | Manual wind. No Date Black dial with two white sub dials White tachymeter scale Ca. 1968 bis 1972 |
 | Argonaut Chrono | 8501 001 | Certina 29-052 Valjoux 726 | 38 x 42 x 12 | Manual wind. No Date Black dial with three white sub dials About from 1968 to 1972 |
 | Argonaut Chrono | 8501 001 | Certina 29-052 Valjoux 726 | 38 x 42 x 12 | Manual wind. No Date White dial with three black sub dials Black tachymeter scale About from 1968 to 1972 |
 | Argonaut Chrono | 8501 501 | Certina 29-062 Valjoux 726 | 38 x 42 x 12 | Manual wind. No Date Black dial with three white sub dials White tachymeter scale About from 1968 to 1972 |
 | Argonaut Chrono 200M | 8401 002 | Certina 29-053 Valjoux 23 | 40 x 46 | Manual wind. No Date. Black dial with two sub dials at 3 and 6 Rotating bezel Water resistant to 220 metres About from 1968 to 1972 |
Update: 12.14.2009