The France and Germany Star.

A six pointed star, in the centre the royal cypher GRI VI , within a circlet bearing the title "THE FRANCE AND GERMANY STAR". A crown is positioned on the circlet at 12 o'clock.
Bars issued; one, "Atlantic"
Awarded for service in France, Belgium, Holland and Germany, between D-Day and the German Surrender (6th June 1944 to 8th May 1945) Navy :Service in support of land operations. Air Force: Service over Europe within the qualifying period. (excluding missions started from the Mediterranean)

Also see official 1945 Government statement. and  Medals of the Regiments for qualification by regiment for Infantry and Cavalry units.

The Ribbon

Red white and blue, symbolic of the Union Jack, and the French and Dutch Tricolours.
 

Photograph above. original on the left, copy on the right.
observations:
The ring on the copy is brass coloured and larger. (note: some original late issues have large rings)
The central area is more raised in the copy.
Ring suspension area is thinner in the copy. (not a  reliable indicator)
Pebbling within the circlet is more coarse grained in the copy.

Note: both stars were cleaned before taking  more photographs. It was noted that the copy had had some form of artificial aging finish applied. This was not 100% removable and traces are visible in the photographs of the copy.

Two photographs above; copy top, original bottom.
observations:
Again, coarse nature of the circlet pebbling evident in the copy
Letters have a wider, clearer, flatter surface in the original.
All the letter shapes are different between the two.

Two photographs above; copy top, original bottom.
observations:
The Crown's Fleur de lys in the copy are weak and asymmetrical.
There are five full pearls/beads in the crowns centre on the copy, as apposed to four on the original.
Crude lumps of metal evident joining the "G" to the circlet rim and the "I" to the "R" in the Royal Cypher on the copy.
The outer wall of the circlet has a sloping appearance on the copy.

Photograph above; original left, copy right.
observations:
The copy is thinner.
The hole for the ring is larger in the copy.
The copy ring looks brassy.