How do Ultramarines show Company markings/colours?

[Emperor's Furor]

I don't have the last book but I really want to get it, however can anyone tell me how these are represented on their armour? I know of three so far but they seem to be special cases (Aegida Company and Nova Company) Then there's the Iron snakes company which has a brief mention.

[Charlo]

Book 5 has a page of markings for the Ultras - could be a good resource :)

[Slips]

Here you go:

 

 

 

Doesn't really answer your question though :x

[Emperor's Furor]

Book 5 has a page of markings for the Ultras - could be a good resource

As I said I don't have the last book at the moment as I haven't had the money, I have all the previous ones though.

[Calas Typhon]

Its not really given, unless someone wishes to correct me.

 

There have been mentions of certain characters using certain colour schemes on their plate. There have also been mentions of certain chapters using certain colours for trims and plates, including heraldry.

 

Again, unless someone wishes to correct me, there is nothing set for it, and it is entirely up to you if you make a chapter.

[shandwen]

In the most recent e-book it was mentioned that on chapter's veterans decorated thier pauldrons with thier captains coat of arms (or a part of it). The captain actually disliked it but permitted it as to not permit it would be in poor taste. So do what you want.

[Lucien Eilam]

There are several examples in the heraldry section of Chapter numerals in the bottom right corner of the right pauldron. One of the Legionary examples is from the 7th Chapter, and probably has a VII on his right pauldron.
 
However, there's this marking from a Breacher Marine's shield. The IX refers to the 9th Chapter, the 402 refers to the 402nd Flotilla of the Ultramarines' fleet which he was attached to. His right pauldron probably has XCVII on it, referring to the 97th Company, not his Chapter.
 
And there are also examples of XIII for the Legion being displayed on the right pauldron.
 
So numerals are on the right pauldron are typical, but they could equally refer to the Company, Chapter or the Legion as a whole. And the majority of examples don't have any indication of Company or Chapter at all.
 
Then there's an Apothecary with XXVII prominently displayed in multiple places, but he was from the Support Echelon, 3rd Chapter. Likewise, there's a Destroyer Marine with a CXX on his knee-pad, but he was from the 2nd Destroyer Company, 22nd Chapter. No explanation in either case of what 27 or 120 represented for those Marines.
 
Lucretius Corvo's heraldry is described in some detail in The Laurel of Defiance:
 

The cobalt-blue of his plate was quartered with bone-white. His personal banner, hanging from a pole mounted on his power plant, was likewise divided. It bore the emblems of the Ninth Chapter and the 90th Company. In the top left field was a spiked, hollow circle: a dark blue starburst.
 
This was not of Legion origin.

 
(The bone-white quartering and starburst are personal heraldry derived from his the now-extinct house he was born into, which he's allowed to wear as Captain of the 90th Company.)
 
So you could paint an occasional number on them somewhere presumably representing anything from their squad to the Legion. Maybe an occasional element of personal heraldry or honour marking. But mostly, Company/Chapter seems to have gone unmarked on armour.
 
Banners should probably have Company and Chapter emblems, but there are few concrete examples of what those emblems looked like.

 

It seems weird that the Ultramarines were so much less concerned with organisational markings before being split up into Chapters than they were afterwards, but that seems to be the obvious conclusion based on what Forge World have shown us.