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.
This typeface, designed by Max Miedinger and other project members at the Haas’sche Schriftgiesserei, has become one of the most famous and popular typefaces in the world, thanks to the marketing strategy of Stempel and Linotype. It forms an integral part of many printers and operating systems. The original letterforms of Helvetica had to be modified for the Linotype system. Over the years, Helvetica was expanded to include many different weights, but these were not coordinated with each other.