L2.793.4.78.3Ref

This classical wristwatch from Longines' Master Collection has a round case and automatic movement. In the silver-dialed reference L2.793.4.78.3, the listed caliber is L888.3, but depending on production year it could run on L619 or L888 (with -2 from 2017 on, -3 from 2019 on).