Scythe sword

This sword has a representation of a runic calendar incised on the blade.

Demmin (1893) notes the existence of other sword blades of the early 16th century bearing runic calendars in Berlin, Vienna, Paris, Munich, Graz and Luxembourg.

It is possible that "scythe sword" may refer to the Thracian romphaia (Greek: ῥομφαία), most commonly a long curved blade with its[1] cutting edge on the concave or inside edge with a piercing point, attached to a pole (wood handle) that's shorter than the blade.

The romphaia was a close-combat bladed weapon used by the Thracians as early as 350–400 BC.

So, "scythe sword" could refer to a romphaia, or falx possibly.