The Imperial Panthers is as said earlier, not completely organized as the Codex: Astartes suggests. Their badges and markings are also very unlike that of many chapters, but with likenesses to some. Confusing? Much things in the 41st millennia are confusing. 

To tell you the truth, I was inspired by the Salamanders way of changing chapter badge for each company, with 1st and 2nd sharing the 'real' chapter badge. I wanted to take this even further, with marking for Command squads, Tactical squads etc... Below you'll see the different chapter markings of each company. Note that 1st and 10th share the same badge. Those of you to remember the time when each company had a different trim-color on their shoulder pads may recognize the system. Below that can be found the squad markings and color schemes for ordinary marines, 1si company marines and Terminators and Scouts. The storm bolter and bolt gun colors will also be placed here.

1st and 10th Comp.	2nd Comp.	3rd Comp.	4th Comp.	5th Comp.	6th Comp.	7th Comp.	8th Comp.	9th Comp.

Squad Markings

Elite Squad	Command Squad	Tactical Squad	Assault Squad	Devastator Squad