I don’t know this instrument but npor http://www.npor.org.uk/NPORView.html?RI=N16925 indicates many “prepared for” stops.
Two questions, well three really:
Is npor accurate and up-to-date?
What’s the instrument like, for services and as a recital instrument?
“Prepared for” stops—in general how often are they eventually provided and how often do they remain as a, ahem, perpetual pipe dream?