I got the German Gun Collector's journal in, which was very helpful. Lots of articles by Ken! Also the repro catalog by Cornell. Also helpful.

I talked to a Daly collector last night who said most of the Prussian diamond quality 10 gauge Dalys were extractor guns and he gave me a better sense of values for them.

I did call Artemis Guns to ask about the Diamond Prussian 10 gauge I posted here earlier. There were some discrepancies in their listing, which others asked about here. It is choked full and extra full. It does have extractors. The thing I can't get past is the crazy cast off. It was heavily bent for a left eyed dominant shooter.

The search continues.