Next, let's take a look at some very cool flange signs!

This is the earliest example I've found - the Diamond Gas - Oils flange from the 1910s.

photo: John O'Hern

Here is a Diamond 760 Motor Oil flange from the mid 1930s.

This Diamond Kerosene flange is from the same era.

photo: Maurice Campbell

Here's another version from the same period, but from a different manufacturer.

photo: Dan Matthews