You need to do some serious research mate. The forum has an archive search facility that is second to none, use it. Try punching in "Deschler DKiS" or "Deschler DKiG" and study the images. In this case it won't take you long to find the answer.
'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.
Your feeling is right: it is a (light distinguishable) fake