Rotol Hydraulic Pump Type RFP/1 – info sought

I came across one of these in my favourite junk shop today.

Judging by its Type prefix, am I correct in guessing it’s a propellor feathering pump? If so, what type of engine/propellor might it have worked with?

It is in good condition and is probably unused.

Any Spitfires out there need a propellor feathering pump…? :rolleyes: