According to the Archives of Jaeger-LeCoultre, the present watch was manufactured in 1974.
This watch is a prototype of one of Jaeger-LeCoultre's automatic watches featuring a calibre 906 movement. Most notable is the stop seconds or hack mechanism, made of green molded plastic blocking the balance wheel when the crown is pulled out.
The automatic calibre 906 with chronometer standards remained in production during a very short period of time. It was also supplied as an ébauche to Vacheron Constantin and used in the Chronomètre Royal series.