As I work my way around this new to me 1995 C36, I find a rather unusual toilet in the head. It has a foot pedal on the left side and what appears to be a long pump on the right side. Could this have been originally in place when the boat was built? The benefit of this toilet as it appears is that the bowl is the size of a household toilet. 
Sorry I dont have pics yet but can anyone confirm it is a Groco K model and advise onhow it functions? Thanks...

Rick