It’s always pleasant to come across a CI prefix on advertising.  The two-letter Ci (Circle) prefix – it was the two-letter, five number system – meant that you had an early phone (assigned to your residence or business).  I think Ci5 was very early because I don’t recall ever seeing a Ci4.  But I was a kid, what did I know… The two-letter, 5-number system was replaced by the 10-number system sometime in the 60’s.
This piece, a bank blotter (I think), is 7.5″ long and 3.75″ high.  My Colorblind Assistant (great program!) names the color as “Midnight Blue” (good oldie, too).

Rock on.