The Valjoux 234 is a celebrated hand-winding chronograph movement produced from 1974. A higher-beat replacement for the venerable Valjoux 23, it operates at 21,600 A/h rather than 18,000 A/h and adds a date function. The Valjoux 234 was introduced in 1974 and produced only in the 1970s originally.

The Valjoux 234 and 730 are almost identical except that the latter adds a 12 hour counter at 6:00 on the dial. The Valjoux 234 is also very similar to the Valjoux 236, which lacks the date complication.

• Central hours and minute hands and chronograph seconds
• 30 minute counter at 3:00
• Running small seconds at 9:00

A cheaper “Green Setting” variant used green plastic bearings for the balance and thus had just 13 jewels.

The Valjoux 234 was used in historic watches from Enicar as well as the 2003 limited-edition Panerai Radiomir Chrono PAM00163.

	18,000 A/h No Chronograph	18,000 A/h No Hour Counter	18,000 A/h Hour Counter	21,600 A/h No Hour Counter	21,600 A/h Hour Counter
Base		Valjoux 23	Valjoux 72 Valjoux 722	Valjoux 236	Valjoux 726 Valjoux 727
Flyback		Valjoux 230	Valjoux 720	Valjoux 235	Valjoux 725
Date				Valjoux 234
Triple Date	Valjoux 69 Valjoux 78	Valjoux 23C	Valjoux 723 Valjoux 72C		Valjoux 730
Flyback and Date				Valjoux 237
24 Hour Hand			Valjoux 724		Valjoux 729
Calendar and Moon Phase	Valjoux 89 Valjoux 90		Valjoux 88		Valjoux 886
Tide Calculator			Valjoux 721