Grooving and Chamfering, Two Heads

Vertical Turret Lathe (Boring Mill) (Three titles, 8 reels). Defense training film; one of a series of over fifty sound films, from one to three reels in length, made by the best professional producers under direction of the U. S. Office of Education, offered on loan at a $1 per reel service charge, and for outright sale at extremely low cost prices.