I am currently making a (rough) reproduction of the Nijmegen sax.
I will be posting some pictures of the process on my blog:
http://benpotterbladesmith.blogspot.com/

Enjoy.

Always nice to see a Dutch weapon reproduced. :)

However, I fear that the hilt in your sketch seems to be a bit on the short side. Also, the original seems to have a "scandi-grind" edge profile, rather than the flat or convex profile usual for saxes.

I've attached a top-view of the same sax for comparison. Length is 59cm. And a picture where the grind can be seen. More pictures can be found in Jeroen's "information about saxes" file.

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Thanks for the input.

It is exceedingly rare to see a sax with a defined ground in edge, as in "scandi grind" (I cannot remember seeing one single example). This type of grind is rare on most types of knives in the european tradition before the industrial revolution. It is one of the most commonly made mistakes we see on modern replicas. I guess this is because it is the expected norm on most modern knives.

Cross section on seaxes is almost always triangular with an apple seed sharpening. This is true for narrow seaxes, light broad saxes, broad saxes and lag saxes. Sometimes the apple seed edge is so generous and sturdy that the edge faces are may look like almost parallel, but there is always some taper in the section.

Various types of groves and fullers may decorate these blades. Some set ups are more common with certain types.

Narrow saxes (like the Nijmegen sax in this thread) are pretty slim in shape and proportions. They are more big knives than short swords. Think large japanese tanto. Or perhaps bayonet? They commonly have scraped groves, but only rarely fullers between there groves. You do find decorative engravings on a number of them that originally were inlayed with silver.

Thickness of the back is some 5 millimeters or so, at a width of some 30 millimeters at base. Dimensions would vary according to size. A slightly bigger blade would probably be a tiny bit thicker, while a slimmer example would be thinner.

Point tend to be a not-quite-centered spear point, and the back sometimes has a very slight hint of a clip point form. It can also be a slightly of set spear point made up of two smooth curves. It tends to be rather drawn out. Generally not so much belly in the point.

Thanks for all the help.

I do need to say that the length of the piece was set by the customer at around 18" so it will be bit shorter than the original. Also, the sketch is a VERY rough sketch the blade profile will be different and the dimensions are only nominal. After HT the piece is slightly over 18" with a 5 1/2" tang. it is 3/16" thick at the base of the blade with a Appleseed V grind.
My camera battery died yesterday which is why I haven't posted pictures yet.

Here is the blade so far. It is polished out to 800gt and heat treated.
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I'll be polishing again tomorrow so I may not post for a bit.

Oh that's looking REALLY nice. I can't wait to see how this turns out.

Here is the last couple of days progress:
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I have a little more to do on the blade and then on to the hilt.

Here is the guards and pommel inlet:
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Nice. I am loving the engraving on the blade.

Shaped and polished the hilt fittings today:
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Here is the day's progress:
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Here is the hilt as it sits tonight:
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Lord willing I will bed the hilt and peen the tang tomorrow and have this one finished.