Venus Cal. 178 is part of the Venus 175 family of movements. It is a hand-winding column wheel chronograph movement. Similar to the base Venus 175/176, it adds a 12-hour chronograph register at 6:00. The dial features a 3-6-9 subdial arrangement. The hour counter was still fairly uncommon at this time, and the three-subdial arrangement remains very attractive.
Cal. 178 was introduced around 1947, substantially modified in 1949, and retired around 1960.
Venus 175 Family
| Complications | Standard | Split Seconds |
|---|---|---|
| Base | Venus 175 Venus 176 | Venus 179 |
| Hour Counter | Venus 178 | Venus 185 |
| Date, Hour Counter | Venus 183 | Venus 189 |
| Date, Moon Phase, Hour Counter | Venus 184 | Venus 190 |
| Calendar | Venus 194 | |
| Calendar, Moon Phase | Venus 198 | Venus 205 |
| Calendar, Hour Counter | Venus 192 | Venus 193 |
More detail on the history of Vénus is available in the Grail Watch article, “The Rise of Vénus, Legendary Chronograph Maker“