The ETA (formerly Peseux) 7001 is a hand-winding 10.5 ligne movement. It is found in many watches and is the basis for movements and complications from other watchmakers. One notable user is Nomos, which adapted the 7001 design into their Nomos 1 family. The movement was produced by Peseux until about 1985 and ETA until 2004. In 2011 production was restarted under the ETA 7001 name and it remains in production as of 2019. Later versions have an optional excenter ETACHRON regulator.

The Sea-Gull ST3621 is similar. Maurice Lacroix used this as their Cal. ML101.