cotypefoundry.com/our-fonts/rm-mono/

“As CoType Foundry has evolved over the years, so too have our fonts,” Founder Mark Bloom tells us. “We’re not only updating our library with new releases but expanding upon our existing typefaces too.” CoType’s popular inventory continues to grow with the launch of RM Mono. As part of the longstanding RM family, this monospaced addition closely follows the original design of RM Neue and its utilitarian roots with some added alternates; such as a single-storey ‘a,’ ‘f’ with a bottom serif, and a new alternate ‘R.’   As Bloom explains, the mono version is a proportional counterpart of RM Neue, with the key focus being to preserve the “DNA” of the original family, despite the tweaks made to some letters to fit them to a fixed width. “This means retaining the angle of terminals, the shape of the bowls, the contrast, and any individual peculiarities that make a particular typeface recognisable,” Bloom notes.