Kocet-Kocetan hilt form

[Alam Shah]

Hi all,

Looking into Ensiklopedi Keris (see picture attached, from pg. 250). For some hilts, the head does look like a horse. The texts explained that it's a horse head.
Based on examples posted here, there seems to be those that looks like horse head and some that's clear cut a bug-like head.

Could there a hilt transformation, from the bug-like head into into a horse head?
Or could it be, the case where later craftsman, carved hilts without knowledge of the symbolism attached?
Or is there two hilt forms with different head type, a bug and a horse?

Btw, there is a famous keris with a kocet-kocetan hilt, Keris Ki Puspa Wijaya. (see Pusaka Keris, Vol 07-08/2007, pg.61).