I found out the name of "H" !!
If I had pictured him with the backpack I had from him (duh I couldn't put 2 and 2 together) some of you would have recognised that he is in fact Commander Jack Reilly from the Kenner line "Sky commanders", a link to what he looks like close up!
Additionally I also have the back pack complete!!!!!

http://figure-archive.net/item.aspx?itemID=2085