I am guessing this display was used for the line of Parker 75 and Classic 75 BPs. This is because the sterling silver grid 75 FP was never priced at 19.95; instead its first price when introduced in 1964 was $25. Furthermore, since there is a missing gap in the price lists, this $19.95 sterling BP puts this display sometime between 1972 ($15) and 1977 ($22.50)
Here are views of the back and side.
Here's a close-up of the manufacturer's label.
The company Display Corporation International was based in Milwaukee, WI.