Agree with Jeff they are very clear for stamping. Not sure how they would have engraved it so uniform either.
They are oil filled.
Autolite text appears to be the same size on the fronts and rears. Bottom of the "A" to the end of the "E" is 1.614"
Diameter of the top rear is 6.338"
Diameter of the Fronts is 5.118"
Rear top of thread to end of bottom thread 15.551"
I'd describe the thread as fine, photo below.
Photo of Front shock top.
Photo of Front shock bottom.