When I want to improve a watch introduction, I use 2 tricks to do it.
First, I make the watch in Fusion 360 and I get vector file like PDF or DXF. From that I import the file in Sketchbook in order to get color, highlights, ground etc. Second, I can open this file in photoshop in order to sketch new shapes like arrows or give more contrast if I consider it necessary
In this sketch I have just introduced a view but I can make 3 or 4 even making an exploratory sketch of small parts.