It' a genuine 1st pattern Juncker Luft Flak to me, but the pin seems too thick which means it's been replaced. The catch is certainly a later replacement. I personally would avoid this badge as the collectability value is seriously compromised.
'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.
Thanks Big Ned, that is interesting info.