This ETA caliber 2094 was found in a Hamilton Jazzmaster Face2Face watch which has dual automatic movements. Because of the double movement design, small movements were necessary. The small size is a notable feature of the 2094.
The caliber 2094 is basically an ETA caliber 2004-1 base with a chronograph module added to it. The caliber 2004-1 is essentially a smaller 2824-A2.