Hi,
for me this was the most untainted by collectors hands big group I have seen. The 1st collector to own it did not collect german, and had no idea what a round 3 cross was.
There is absolutely no doubt in my mind that this cross is koscher, as is.
Some collectors doubt the stamp on this piece is a maker stamp, that is their right, I am a big preacher for collectors to be a "healthy sceptics". I have passed up good and bad in the past in an effort to be careful. So I can understand that.
Having said that, for me there is not a 0.001% doubt in my mind, that this is what it is, stamp and all.
best
Chris