These may belong to your Grand father but still these are fake. Where's the Hijri Medal? Even Defence Personnel on duties to the Gulf Countries (Building their Armies and Air Forces), got that as well. Even my dad, posted to the then Abu Dhabi AIr Force received his Hijri Medal in 1981 and the ribbon 1980.
One more thing, considering this collection has the Republic Medal 1956, and the 10, 20 and 30 year Service Medals, which were introduced to the Generals in '92 and given to everyone else by 94, where are your Grand Dad's Democracy Medal 1988 and 50th Jubilee of the Pakistan Resolution Medal 1990.
HENCE PROVEN:
IT'S A FAKE