Can you identify these unit crests?

[t_player]

I've tried but can't find these in any books I have.HELP!

[Dave Danner]

The second, with the motto "More than expected", is for the 19th Maintenance Battalion, formerly the 19th Ordnance Battalion. I would guess the first, with the "nunc et olim" motto, is for a similar combat service support unit, but I don't know.

[VerKuilen Ager]

"Nunc et Olim" (Now As Before) is the 8th Rgt (CST). However, when your pinback was probably made it was still the 905th Field Artillery Bn.