I also like the additional information, I know it was introduced in 1955 and only the early model(s) had the single front headlamp.
What I do not know is how long it retained that feature.
Outside of this image, every other Tippen Delta I have seen has two headlamps.
I took a wild guess on the year to be honest.
Now that I look up some stuff.... The Tippen Delta 2 with a single headlamp appears to have only been available for 1958.
I've found it difficult to rely on information in books and especially car placards at car shows and "museums" in general.
I can't begin to tell you how many "1954" BMW Isettas are out there. And they are in the USA!
Several of them are have the extremely rare 2-cyl VW prototype engines as well!
At least that is what the caption on the photo or the car placard says!