Underwood Champion M Typewriter. 1930’s - 1940’s. This was made with a 5th row of green keys to line up columns of numbers to the left or right of a decimal point. Businesses such as accounting, banking, investing, mining, manufacturing, etc., were likely to have had a need for this setup. RARE. Serial #M4857334-11. The “M” stands for Master Model. Needs cleaning, new ribbon, and some work. Several keys have some cosmetic damage.