The KCM is the name of a mold, one of the most famous molds Kyoei has produced in the modern era of golf. It has won countless victories on multiple tours in the hands of players across more than a few brands.
The heritage series pays homage to the factory and the KCM mold itself and to name a specific model based on the mold is unheard of as most brands try their best to hide mold names from the public.
The predecessor of this iron was known KYOEI was the KK MB. In 2021 KYOEI has updated the shape and design.