Shimano triple ring crankset think its an stx set as all badging has worn off its an educated guess ,  175 mm arm length rings are 22t , 32t and 44t , its useable but well used and really better suited as fitting to your wall hanging classic mtb , the square tapers are worn on the inside but when bolted up are  fine , remember this is a 1980s set so is not fantastic but will polish up well , please see pics for anything else .any qs please ask.