Many typefaces designed with a pen on paper (especially those from the 20th century) were licensed by different foundries, and were later independently digitized by them. Some special characters such as @ or the euro sign, were independently added later. Those “alternate cuts” are different digital versions of basically the same typeface design. They often vary in character set, letter proportions and kerning. Some are published under different names.
Designed by Eric Gill and released by the Monotype Corporation between 1928 and 1930, Gill Sans is based on the typeface Edward Johnston, the innovative British letterer and teacher, designed in 1916 for the signage of the London Underground.