are these Mccobb chairs reasonably comfortable?  

The Pascoe chair and it's variants
The McCobb chair came first in early 1951.
The Pascoe chair for Modernmasters a few months later.
Then there was the 1953 Country Workshop version which was virtually identical to the Modernmasters/Pascoe chair except for the backrest which was fully rounded where the Pascoe backrest is slightly squared

There is some information to suggest a version made by Selig around 1957 and yet another variant in 1960 by Reilly-Wolff.
http://paulmccobb.blogspot.com

No problem with Pascoe over h...
No problem with Pascoe over here.