This blue laboratory scale (still in the box) was made by Pelouze Scale and Manufacturing Co in the 1950s.
The company was founded in 1894 by William N. Pelouze who was the brother in law of William Hale Thompson, the notorious mayor of Chicago.
The company made various models of scales and electric heaters over the years and was eventually bought by Rubbermaid, which was bought by Newell Co. in 1999.
Pelouze scales continue to be available, now made by Newell Rubbermaid. Previous Pelooze post from the Duke.
More info here.