All of a sudden I thought it might be interesting to describe subtle details of various Truppenkennzeichen painted on vehicles. The golden rule is "When it is drawn differently, it may well be from a different unit.", but yes, there are differences between symbols from the same unit, too.
The following illustrations are traced from actual photographs using graphics softwares. Let's start with Pz.Abt.z.b.V.40.
a Panzerkampfwagen I Ausf.A
April 8, 1940
in a German town, probably Heyde
Panzerblatt No.11 (Armour Modelling magazine, issue 11, October 1998)
a Panzerkampfwagen I Ausf.A
April 1940
in a port in Norway.
Author's collection
a Panzerkampfwagen II Ausf.C
April 1940
mountain area in Norway.
Panzerblatt No.11 (Armour Modelling magazine, issue 11, October 1998)