Sample 1:

Jacket:

earlyrh_front earlyrh_backjacket_1_front jacket_2_back jacket_tag

Jacket twill is similar to later issue and arid versions.  Bottom pockets have elastic material at rim which was not retained in later, standard version.

Jacket has same cut as arid version.

front_comparison

Pattern shapes are different than shapes on arid season and later, standard version (arid and later have the same shapes):

back_comparison

Pants:

pants_1_front pants_2_back pants_tag

Pants twill is rougher, more rigid denim.  Possibly similar to denim battledress overall material.  Ink appears to be sitting on surface like paint, not soaked in; could be why these have a tendency to fade translucently.

Sample 2:

   

Jacket is similar to that of Sample 1.  Has Army patches on arms.