Original Post Vietnam War Silver Star Medal Grouping, Unattributed Cheap

A nice condition post Vietnam War era grouping comprising Silver Star, Bronze Star and Air Medal with accompanying ribbons. All are unnamed, some glue residue on the reverse. 

There is a Star device on the Silver Star ribbon, denoting an additional award. The Army and Air Force use an oak leaf, the star is only used by the Navy, Marine Corps and Coast Guard.

The Bronze Star has a V for Valor device.

Upon the Air Medal ribbon bar only is a Bronze Star device, a V for Valor and a 5 Numeral for additional awards. Missing from the medal drape itself.

Assumed to be post-Vietnam given the V device on the Air Medal which is a later decoration.