Hi Spiridonov,
Please do understand that I cannot repeat all the dating criteria and images that I posted here before; that's why I sent you the link to all my former posts.
It took me about 30 years to learn by close study of the respective objects and their formal criteria, tiny and almost meaningless though they may seem to others. All I can try to do here is give sort of a bottom line, quintessence or take home message citing the most visible and important criteria.
For the Nuremberg haquebut in question these are length, handle, shape of the barrrel, shape and place of the touch hole, and the short and heavily swamped muzzle section.
I know it's not that easy to be a believer sometimes and you are working really hard trying to grasp my points, especially given the fact that English is neither my nor your native language. So I do hope that you can accept what I have been trying to convey.
Best,
Michael