Note: Casts from any given edition will be essentially identical both in form as well as in size (understanding that within an edition different bases may be used and there may be variations in how the edition is mounted) yet may vary owing to casting flaws or to differences in chasing, patination, or to deterioration of the molds/chef-modèle over time. Whereas before the 19th century it was rare for replicas to be made without any small variations (hence the use of the term ‘versions’), modern bronze casting practice is more consistent, and generally predicated on the notion of editions. From the early 20th century, it became common practice to mark casts with their individual number within their edition.