05-17-2015 02:02 AM
Difficult to see the details with these pics, but it does look to be a so-called R.K. example.
From what I can see, this one's the (5) vein, un-pebbled leaf variation.
It also looks to have the soft/distorted details (especially the Adler) that is a known attribute of the R.K. variants.
Finish is the chrome-silver or glanzverzinkt coating.
In regards to attribution (R.K.), this ISA is thought to be produced by Rudolf A. Karneth & Sohn, Gablonz but the maker Robert H. Kreisel, Gablonz - PKZ 67 is also a feasible candidate.
To date, solid proof on who actually produced these examples has yet to surface.
Best regards, fischer
Many thanks Fischer for your very informative answer
Best regards Mike
Please post better scans or photos when it arrives...
Best Regards, fischer