A photo (I hope)

[jurassic]

I believe that Wagner necks were used on the early H-D frames.

that is not correct. the wagner frame neck had to accept three frame tubes ,unlike the harley neck, which only had two frame tubes attached to it.

[Chris Haynes]

Jerrasic,
Have you ever looked and an early H-D frame? They all have the lug for the third frame tube on them.
Here is what may be a 1908. It clearly shows the unused leg for the third tube.

[jurassic]

thats actually a sidecar mount,and on close inspection looks completly different than the wagner neck. not even close.

[Chris Haynes]

A tapered sidecar mount? This neck was used 1905-1908. You think the boys were thinking about a sidecar when they built their first machine? In "Harley-Davidson, an Official Eighty Year History" author David Wright says that H-D first produced sidecars in 1914. There is an undated photo of a very early H-D with a wicker chair sidecar in "At the Creation", page 89.
It may not be the same as the Wagner. But it was purchased from someone.