The Knox Concrete Block Machine

Thank you to a reader, Donovan, for sending these photos of his restored and unrestored Knox concrete block machines. His YouTube video 

demonstrates making a block, and his YouTube channel has more videos about other block machines.

Knox was one of the brands sold by Sears, Roebuck & Co. in 1915. 

 Sears, Roebuck & Co. Concrete Machinery, 1915, pg. 16