What a cute idea. I have a 1951 fridge with the little freezer inside and we use it as our fridge. It has worked for this long and hasn't stopped, so we keep her going. She has to be defrosted about twice a year and I think it uses LESS energy then new ones, as it closes tight with the latch so no cold leaks out whilst modern ones just have the rubber seal.
This really is adorable.