'72 AMF Night Hawk and '73 AMF Nighthawk riser was advertized as being made of maple with various color glasses being used. - Not yours.
'74 & '75 they changed the name to Hawk and the riser was made of "Exotic hardwoods".
I do not have a '76 catalog - never have seen one.
Then in '77, they called it Night Hawk (2 words) with a maple riser. - Again, not yours.
From '78 on, Hawk line was a no show.
So I would put your bow somewhere between '74-'76.
I could be a little wrong, but the best I can make out, In '51 to '67, the company name was simply "Wing". In'68/69Bob Lee sold the company and from then until end of '70 was called "Wing, A division of Head Ski". Then in '71/72, AMF purchased the company and it became "AMF Wing".
Also, I found your gripper in 3Rivers;
http://www.3riversarchery.com/product.asp?i=3592 Al(Als Decals)