Q327.  Kogai in yamagane (mountain metal or native copper).1.2 x 21 cm.  There is deeper than usual carving of waves, accented with a tiny bit of gold and silver ten zogan.  There is the slightest bit of undulation in the blade; it may have been bent and straightened.  Otherwise condition is excellent and the color is a rich red brown.  In a box.  $295.