Here are the two variations of P. M. D. (Pure Milk Dairy) half pints from California.
Not the best photo - sorry.
There is a quart as well which I don't have.
Hermes Ohio & Pittsburg. Not the best photo. Lots of subtle differences. Look at the S in the lower Pittsburg plus the "&"
Hard to see in the picture, but the bottle on the right has the word REGISTERED on the heel.