Hans "Specker" Grünberg (8 July 1917 – 16 January 1998) was a former Luftwaffe fighter ace and recipient of the Knight's Cross of the Iron Cross (German: Ritterkreuz des Eisernen Kreuzes) during World War II.
The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership.
Grünberg shot down 82 enemy aircraft in 550 missions.