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.
When designing Berthold Baskerville Book, Günter Gerhard Lange analyzed and compared John Baskerville’s original type (1752-1757) and countless cuts based on the original design.
Lange’s interpretation also took into account today’s printing and composing technology.