What type of sword is this?

Looks like a seax from here.

myarmoury has such a huge base of collectors on seax, if this is one...

^^^What Luka said, it's hard to tell from the image.

Try Tod's Stuff. I dunno if anyone else makes that sort of thing.
www.todsstuff.co.uk/

It could be a dussak
www.dreynschlag.at/historisches_ ... hnik01.php
www.dreynschlag.at/historisches_ ... hnik03.php
swordforum.com/vb3/attachment.ph ... 1140368053

Or a falchion. But i'm only guessing, your best bet would be to go to myarmoury and see if they know.

I'm interested in finding out what it is too.

Konrad Witz was a 15th Century German painter who home based out of Basil Switzerland. His reputation rests on three altar pieces surviving. Period altar displays were narrative themed multi panelled affairs.

Given the fact this is 15th Century Basel it could be a messer or falchion. But if the theme of the panel is Biblical it could just as easily be an oriental sword.

This pic is a book cover that I can't find a matching descriptor for that tells what the subject is.

Hope that provides someone a clue. Best I can do...

I think that image is taken from the Heilspiegel altar piece.

It is a Falicoin, nothing else....SanMarc.

Seems like it was popular to depict Abraham with a Falchion type blade.

Renaissance artistic interpretation I suppose.

True, Oriental characters were often portrayed with curved blades as a sort of artistic shorthand, but most of the time the actual weapons depicted were European style falchions, messers, stortas etc. rather than actual Eastern sword types, these being what the artists had on hand for reference.

Considering the time and place, this would almost have to be a falchion or messer of some kind, and more probably the latter. The difference between these is mainly in hilt construction: messers had slab tangs sandwiched between riveted grip plates, just like many knives (in fact, "messer" is German for "knife"), whereas falchions had more conventional sword-like hilts with distinct pommels. Now, I'm not 100% sure, but I think I can see the back of a full tang there between brass or latten (or gold, who knows) grip slabs, and there's also no crossguard and the pommel shape is typical of messers. I wouldn't call it a grossemesser (German for "big knife"), either, because it's really not all that large and lacks the crossguard that makes grossemessers so much more useful for fencing than just any old large knife.

So given all that, I'd put my money on it being a particularly ornate messer, hauswehr or bauernwehr - all different terms for a late Medieval or Renaissance group of large knives pretty much ubiquitous in German-speaking regions, carried as a general purpose cutting tool as well as a handy close-range weapon, like a forerunner of bowie knives. Also, I'd give 50/50 odds that the specimen portrayed here is either completely fictional or based on a more mundane piece with a healthy dose of artistic license and embellishment.