Original was Jabsco
But after 12 years it's unlikely to still be the original toilet unless the previous owner(s) rarely used the boat...the averge lifespan of a Jabsco manual toilet is about 5 years. So, as Steve said, it's not worth putting ANY money into. You can replace it with another Jabsco for $99 if you catch it on sale...for about twice that, you can have a Raritan PH II or Cricket that'll give you a couple of decades of good service with minimal maintenance. And there are a couple in between as well as a few that cost up to $1,000...marine toilets are like anything else--you get what you pay for.