Hard to date!
With so many things if they were basically made for the commercial trade the styling lagged behind,for big kitchens it might have been in an alcove in a large kitchen that only the help would see so it was no reason for the public to see as such. So styling remained plain and older in some cases.This does look like a pre-war model but may have been used up to the late forties after the war.Like the double Moniter-tops.Above Radio City in NY,they have a penthouse apartment that is a time capsule,never updated since around 33 or 34,it has double monitor tops and a wonderful period kitchen in it I was lucky enough to see this because its off limits on the regular tour and there was only 4 of us on the tour and I asked the guide if I could see the kitchen and he let us.I felt like Ihad gone back in time even a 1930s Westinghouse fan was still mounted on the wall from when it was built.It had tan glazed bricks on the walls it was wonderful,I could almost hear the faint sounds of 42nd Street and other songs of the era.
