Yes, according to the files I have this is a 2nd generation-frame Juncker, one which I would love to have in my collection. These cores have always confused me. The numbers look like scaled down Juncker KC numbers.
I think not, but am not certain. A close up photo of the inner beading would reveal whether it is or not. I look to the one diagonal cut in the beading in one of the inner corners (lower right) to identify this reworked Juncker frame...
Well : I have looked at this one and others some time ago :
At first it looked like a reworked die . But since then I have to say it is not . I am very worried about this one ! It is a die of it's own and not from a Juncker die or even a W&L die of any frame type . The core is has very thin Swastika cut outs and the date -1939- is very wanky !
This is why :
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