I was recently given these two dishes. Granted at first glance one might think these are ceramic darkroom dishes. White ceramic trays were available for darkroom use.
These I believe are tradesman samples for Belfast sinks, complete with overflow and rubber plug.
The transfer label is for Doulton & Co Limited, Lambeth, London.
I’ve not seen the likes of these before and they will make a great soap dishes, as they are far too good for the darkroom, or so I’ve been told.