Parker Vacumatic 1930s
There are a few versions of the Parker Vacumatic. The US versions of this pen are known for stiff but smooth nibs and The UK and Canadian ones generally are softer, but maybe rarer. There are some Vacumatic that has a blue diamond on the clip, thus the pen dates around 1947 and onwards.
The Blue Diamond was added in 1938 indicating a Lifetime Warranty. In 1947, in response to an FTC (Federal Trade Commission) ruling against Lifetime Warranties, Parker stopped painting the Diamond blue and then eliminated that clip design altogether in favor of one similar to the original Feather clip design. US production stopped in 1948, Canadian in 1953. This pen is 60 over years old now...it has a variation of colors as well as pump types too.
