I don't think that is a scuttle in the sense that it is not designed to generate lather in the bowl and keep it warm. Usually the puck of soap resides in the top. Water is placed int the bottom (can be poured over the puck if desired) and the brush is placed in the bottom opening to soak. Load from the puck and then face lather, though you could use a separate bowl to (or scuttle) to make lather, though your grandfather probably face lathered.
Strop has it right. I usually think of these as "vintage scuttles". They would have been commonly used when bathrooms didn't necessarily have hot running water. Actually, they date back to a time when houses didn't necessarily have indoor plumbing.I don't think that is a scuttle in the sense that it is not designed to generate lather in the bowl and keep it warm. Usually the puck of soap resides in the top. Water is placed int the bottom (can be poured over the puck if desired) and the brush is placed in the bottom opening to soak. Load from the puck and then face lather, though you could use a separate bowl to (or scuttle) to make lather, though your grandfather probably face lathered.
What you reference are what I call "modern scuttles". They are pretty much a lathering bowl warmed by a water jacket. They can be very pleasant to use.