From Radio Kits, Inc. in New York City. This is a construction manual for their Model HFT-7 tuner kit. The company company used the brand name Arkay which stood for (RK) radio kits.

An ad in the January 1957 issue of Radio-Electronics Magazine (p. 183) listed the price of the HFT-7 radio as
"wired and tested $49.95"
"kit less cover $32.00"
"cover for kit $ 3.95".
Those prices only applied to customers east of the Mississippi. The ad notes, "Prices 5% higher West of the Mississippi".

In 1969 they made what could be the first personal computer!