Zodiac signs: rare and unique features

[Koen G]

Cancer

- Unique:

• Connected by line
  
• Two crayfish
  

- Rare: 

• Legs are incorrectly placed: on the tail [JKP]. This was long thought to be a unique feature but a few examples have now been You are not allowed to view links. Register or Login to view.. Salzburg, M II 180 (1440 Alsace) [KG] and ONB You are not allowed to view links. Register or Login to view. (Prague, Bohemia, 1375?-1400) [Marco]
  

- Notes: 

• Marco Ponzi found a manuscript with You are not allowed to view links. Register or Login to view.: BNF NAL 3191 (Western  France, 1455-60) You are not allowed to view links. Register or Login to view. . However, this manuscript multiplies many signs, so it is debatable whether it's a true parallel.
  
• Marco notes that while double crayfish are possibly unique, double crabs do appear in one other manuscript: You are not allowed to view links. Register or Login to view. (England, ca. 1325-1330, discussed by Olga Koseleff Gordon).