Early mid 60s. Right front unit replaced. Originally, it would have been like the right rear, inner-wound instead of inner and outer like the original higher wattage 6 inch element at left rear. Very popular model as was its sibling with a window in the oven door. I saw lots of them in the kitchens on my paper route. Looks like the front units got the most usage. The green deposit on the 6 " unit probably indicates that a porcelain teakettle was scraped about or boiled dry on it. That might be why the unit had to be replaced. Yes there is a fluorescent light.