Thanks canvasback for all the effort and there looks to be a couple of numbers just ahead of the flats but for now I can't say what part they play. With the "Eagle Crown/S" high on the tubes, I wonder if the tubes were sourced from Germany and this accounts for the lack of the Weipert preliminary stamp of an intertwined script "E" "W"? Although that doesn't really make any sense. Poldi Anticorro/Antikorro/AK arrived on the scene circa 1910( http://www.doublegunshop.com/forums/ubbt...true#Post202701 ) so it was completed post 1910. Quite the puzzle as it seems there are some Weipert perliminary marks missing or the tubes experienced perliminary proof elsewhere before arriving in Weipert. It is also missing the Weipert Nitro stamp. Maybe it was ordered in the white from Suhl prior to 1923??? I've seen that mark on the lower rib before but can't place it at the moment. The frame still makes me want to hold with Wenzel Morgenstern for now.

Kind Regards,

Raimey
rse