Claas Rasspe 522187 bottom cut scythe blade. Available, among others:
Claas
Compact: COMPACT 20, COMPACT 25, COMPACT 30
SF, COLUMBUS, EUROPA, COMET, COSMOS, CORSAR, MERCUR, MATADOR STANDARD, MATADOR GIGANT, CONSUL, PROTECTOR, MERCATOR 50, SENATOR, MERCATOR
Dimensions:
Length: 80mm Width: 76mm Hole diameter: 5.5mm Between holes: 51mm
Manufacturer's code: 522187