Chanel, AW14, Paris.
Jacket with a dropped shoulder seam line from the Chanel Autumn-Winter 2014 collection. In this example, the position of the armhole seam is hidden by the weave of the fabric.
The term “dropped shoulder” is often used to describe sleeves where the armhole position falls on the top of the arm area, in contrast to a set in sleeve where the armhole seam would sit right on top of the shoulder point.
You can read more on the difference between set-in and dropped shoulder sleeves in the post Shaping the Shoulder Curve: The Dropped Shoulder and The Set In Sleeve»
Images from Vogue.co.uk»