[meteorite-list] Another teaching question

[Pete Shugar]

After many posts, I think that I now have a tenuous
handle on the differences between Pallasites and
Mesosideroites.
Now the question is-----------
When looking at  the irons, the Wittmenstraden pattern
and the thickness tell whether it is a 
Coursest   Octahedrite  or just an Octahedrite.
And just for giggles which are the iron and which
are the nickle bands?
Pete