These were imported into the U.S. by an East Coast wholesaler called Inter-Mark and distributed primarily to department stores. (The company seems still to exist as Intermark Industries Inc., headquartered in Miami, FL, though now concentrating on electronics products and parts).
Besides Cipher, they also used the name Columbia, with the same small rectangular headstock badge:
 
 
Both brands sported this rather endearing neckplate:
 
As regards the OEM, I would suspect post-1967 Kawai. The headstock style has much in common with some of the Kingston and St. George models of that period, and the 'warp proof' necks appear to be the same kind of wood laminate used on e.g. the Avalon guitars, as immortalized by The Shaggs. - The Pleasant brand belonged to the Shiro Musical Instruments Mfg Co., but as you say, probably shares the same provenance.