This is a Whitin NW Spinning Frame. Model N-Worsted. First machine built in 1960

From:	Marcel Deshaies (marcel)	(Mon 26 May 2008 20:58:15 EDT)
Here is a Whitin brochure depicting the NM in production. This frame appears to be a 5-1/2" gauge, 184 spindle double-sided frame. Sliver to yarn, semi-worsted spinning. Circa 1972.