F90Y改 Cluster Gundam Kai Prototype

The F90YKai Cluster Gundam Kai Prototype only appeared on the Bandai MJ 169 (August 1993) magazine.

History
The Cluster Gundam Kai Prototype is the further developed form of the F90III-Y Cluster Gundam, and features an early version of the Core Block System later used on the LM312V04 Victory Gundam.