Bearing, big end shell set, Norton early twins, +0 STD ITALY

Bearing, big end journal slipper bearings, STD, for Norton early small journal (1-1/2") twin cylinder engines, 500cc 600cc, Made in Italy MB2267B2. 
Original Part Number:
D12/27; 17828; 067180; 06-7180  - 1 x big end shell set (STD); [2 x big ends eg both cylinders];