A look at Crusader era daggers from 1070 through to 1450 using 3 examples from the Tod Cutler range. https://todcutler.com/collections/medieval-daggers-and-large-knives
The surprisingly acceptable broken back seat, the antenna quill dagger and the cruciform quill dagger.
If you are interested in budget, but excellent medieval knives have a look at www.todcutler.com and if you are interested in museum quality custom work, have a look at www.todsworksshop.com
www.myarmoury.com an excellent resource to find out and chat about all manner of historical weaponry excluding firearms.
