51521-447-731 CASE L BOTTOM (fork) CB250NB/NDB/NC/NDD
This one appears to have come from a CB250NC OR NDD fork assembly, as it has the "442-931" Showa decal.
Current, CB250NA in fast silver, Physiotherapy;- CB400N Helios red, CB450DX, CB400F2 .Pending;-, CB250N X3. CB400NC mot t.b.c, to be replaced by CB450DX...