Unfortunately brand/model is not obvious... (likely places well-stickered by children many years ago). I've turned it up, will see if it seems any colder in the morning. Thinking about when it would have been stickered - said child being me - perhaps it's just dying of old age..
If I want a fridge to get colder, do I turn the dial up? ie. Do the higher numbers correspond to higher power/function/effort or higher temperature?