Triumph 650 Pre Unit Head.  All fins are present.  Could use some clean up and rebuilt before using.  There is a crack at one of the stud holes on the bottom and two of the other stud holes look like they are starting to have hairline cracks form.  The last two photos are meant to show the hairline cracks but they did not show up very well.  Please examine the pictures closely.  Email with questions.  Sold as is.