.
Olham,the depth of the crown wells varied on the originals as did the back design and 'dish'. Without even comparing this badge to an original there are several things that should raise the red flag.
1. Aeroplane fuselage is bent rather than straight.
2. Extra berry in the wreath at the edge of the hilltop.
3. All three hallmarks on the same badge; crescent moon, crown, and silver content mark, (in this case '800' though hard to see in the picture because the pin is in the way).
4. And worst of all, the casting 'tick' at the edge of the crown well. A tick that has been seen repeatedly on hundreds of replica badges from supposedly different makers, representing different air services.
There are other issues that can be seen when compared side-by-side to an authentic WWI badge, but the ones pointed out in the photo cast doubt enough all on their own.
This particular badge is not bad as a display piece but it's not worth the price, unless perhaps it is in fact 800 silver, (given the current market value of silver). But there was no indication that it had been tested to prove such.
.