The messer is a family of similar-looking slightly curved, single-edged blades, with a pointy tip should you need to thrust. Those weapons are known to be cheap, replacers for the arming sword that evolved into the longsword and are also loopholes about a law that forbid commoners from owning swords. It is used by Germans during the Late Middle Ages and Renaissance (14th to 16th centuries, that is).

Pictures of one such weapon: http://www.albion-swords.com/swords/albion/nextgen/soldat-photos.htm

http://24.media.tumblr.com/3ffe40a26034af2e6df84ef6042c4749/tumblr_n2qmux2nJk1s2vu85o1_500.jpg

Messers are also available in one-handed or two-handed versions, the latter being known to be used by Landsknechts when not using their pikes or the Katzbalger.

I have a one-handed messer in mind. Can anyone consider this request, please?

In the possibility of you desiring to see the weapon in action:

https://www.youtube.com/watch?v=UHEs2m0IXAk

https://www.youtube.com/watch?v=cE1rc0c3HCc

https://www.youtube.com/watch?v=38sVdx7nzhQ