Brass Rail JNL is a novelty font, with its name derived from two key components of the source material. It was modeled from examples of vintage small letters stamped out of brass with “rails” above and below each character to fit within a slot.

The most likely use of these letters would have been for either decorative initials or small merchandising signs (similar examples of both have been seen in the past).

From these few examples comes a typeface with numerals, punctuation and an extended character set.