Hi, as I said on the UK forum, check with Yamaha UK to be certain. Are you in the UK?
But, with those pictures I can see it is a standard European 2D, Colour Yamaha Black, the button you refer to is the starter button on the right hand switch gear, they all have an electric starter.
The engine has been painted as the edges to fins on the head and barrel should be polished alloy on the left and right hand side.
If you remove the right hand side cover, is there a Black box about 4" (100mm) x 3" (75mm), if so someone has fitted electronic ignition, if you have the tank off, look at the wiring to the coils, if bullets and Orange wiring = points ignition, if 2 gang multi block with a Red/White wire = electronic ignition.
Also if you remove the left hand points cover with the 3 allen screws retaining it on the end of the crankshaft, (no oil will come out), look at the plate, it will either say 1J7=points or 2F3=electronic ignition.
Also if still original from France they had all chrome mirrors.
Yes the 2D doe’s Red line at 7,500 and the E onwards 9,000, look at the rev counter.
If you post pictures of what you have on the UK forum or here I can identify most models from around the world, I can post pictures of the items you need to look at on the UK site but don’t know how to on the New US site.
Also the clocks are mounted above the top yoke, should be mounted underneath, but that’s another topic.
Hope it helps, Paul.