Ring 7 _ (Black/Olivetti)

This key belongs to an Hispano Olivetti Studio 46, fabricated in Barcelona in 1946.  The number 7 is said to bring luck, as well as symbolizing completeness and perfection. In some cultures, this number represents an ascent and obstacle-free life.

The underscore symbol (_), also called an underline, low line or low dash, is a line drawn under a segment of text. In proofreading, underscoring is a convention that says "set this text in italic type", traditionally used on manuscript or typescript as an instruction to the printer.