Rare custom Itoh crank forward extend fork made in the late 70s judging from the original parts. Frame design is similar to the Murray choppers. I have only seen these in blue. Named Blue Streak.
It is indeed a bar-end with zero offset. Very strong with a wide range of adjustment. I pressed in a plug for good measure to prevent the tube from deforming.Is that a MTB handlebar extension there on that seat post?