How to ID this steering column? Is this original or not?

[MrC1]

My "new" truck came with a tilt-wheel column, but I just noticed that the hazard button is the type from a '78-up model (if I remember right). Here's the only pic I've got of it for now, which doesn't show the right side of the column, but... can any of you guys tell by looking if this is the correct column for a '72?

The button in question is the newer type - the kind with the outer ring you pull up on to release the button after you pushed it.

PIC:

http://pg.photos.yahoo.com/ph/orkeny...fe.jpg&.src=ph