Mailbox Letters Two JNL is the second typeface from Jeff Levine inspired by metal lettering used on mailboxes and homes. Each cast letter or number sat on a lower "rail" which was then slipped into a slot that held them firmly in place. Jeff's Inventory JNL looked close enough to the original type style to use as a model for this font, and for typographic purposes there are certain punctuation and other glyphs that "float" above the rail. Limited character set.