The system allow up to four references in each year line.
⚠️ The FAQ articles (EN/FR/ES) said “two”, and I changed to “four”.
https://en.numista.com/help/mintage-line-reference-210.html
https://en.numista.com/help/variety-line-reference-211.html
Recently I added the references in the year lines of the coin N#110699 but there are five references (KM# 69, Cal# 72, Aureo# 175, CruSeg# 107, CruSeg# 108). I wrote two of them in the same field because of they are from the same catalogue (CruSeg# 107, CruSeg# 108),
Edit: This is a special case and I finally wrote each reference in one year line, but I keep the suggestion.
but this is not possible if we use more reference catalogues.
Could more references fields be added in each year line?
Related: Add two or more references in the same field of year line. https://en.numista.com/forum/topic170893.html