Pair of short Microphone stands Atlas and Berger Industries

Description

Two microphone stands. These are short, maybe 18 to 24 inches in all, including the base, the 3 to 5 inch straight piece, and the 18 to 20 inch bending parts.
The heavy cast iron bases are two different types even though they look nearly identical in shape. Both are 6" in diameter and about 1" in height.
The first is an Atlas. Its PN looks like 763 D or 163D. The cushions on it are cork. It looks like it is the older of the two. Its texture grit is slightly rougher than the other's.
The second is a Berger Industries. The PN appears to be engraved below the company, but I cannot read it. Its cushions look to be rubber.
These are from my father's estate. I do not know when or where he got them, but I do remember him using them in a recording of family guitar jam session in the 1980s. So, I know they are at least that old.