Yes, she's a quarter-wheeler, I would think the last in steam anywhere. I'll
try to scan and post a stern view....
Alistair Deayton has determined that she is one of a class of such vessels built in Britain as part of the World War I effort and intended as towing steamers in Mesopotamia. Obviously, she never got there. Several visitors to her, including myself, have tried and failed to find any marking on her that would identify her with a builder or a specific one of the quarter-wheelers built at the time. But there are engine room markings that make it clear she's British. For those interested in machinery, she has two independent two-cylinder horizontal compounds, one for each wheel. The shafts abut on the centerline and have hubs that can be bolted together to make a single shaft and, in effect, a four-cylinder engine driving both wheels.
As you've surmised, the upperworks were all-new a few years ago.
Bill Worden