as others said, 1970 model rupp bike. Not to go "stock Nazi" but the color is irrelavant because black was not a color offered in 1970. So its been redone, Other thing to note is the tank looks modified at the seam (kinda cool lookin' actually) stand is in a wierd spot and would not be functional that way???
Motor is not orginal. that tank mods says one of 2 things: its either a terrible hack job or a really well done custom, and the paint looks pretty shiney probably not spraybombed so maybe the latter.
Now that chrome however, looks real good! and if its is as nice as it looks, well that stuff is getting very hard to find and a good money maker, I'm still on the hunt for one more REALLY nice 10" wheel and perfect set of handlebars (hint hint :smile
for my '70.