Beverley throatless shear replacement blade set. New old stock. Manufactured in U.S.A. Not Far East import

Not known whether it is B1,2 or 3

Dimensions are as follows 

Top plate

Length 140mm but over curvature 137mm

Width 46mm but over curvature 49.5mm

Thickness 9mm

Bottom Plate

Length 157mm but over curvature 160mm

Width 30mm

Thickness 9mm

Dimensions are approximate only