The pic's are very poor and leave this badge in a position of doubt either way. The pitting on the obverse is a worry, but cannot be seen clearly enough to make a decision on whether it's caused by corrosion or by blow holes from a cast fake. Same with the reverse side, the rear hardware looks suspicious or at the best ambiguous in these crappy pic's. The hardware on these was constant throughout the badges production time and therefore there's no room for slight variations IMO. The position of the catch is of a concern as well, it's very high compared to other zinc Juncker PAB's.
Check out the link below for how the hardware should look, that's what your example should match exactly. If not then you'll know straight away.
Panzerkampfabzeichen in Bronze by C.E.Juncker, Berlin.
'I do not think we can hope for any better thing now.
We shall stick it out to the end, but we are getting weaker of course, and the end cannot be far.
It seems a pity, but I do not think I can write more. R. SCOTT.
Last Entry - For God's sake look after our people.'
In memory of Capt. Robert Falcon Scott, Edward Wilson, Henry Bowers, Lawrence Oates and Edgar Evans. South Pole Expedition, 30th March 1912.
Thank you very much and best regards