Hello All, i couldn't identify one of my latest mb, it looks 236 to me. it might has multiple donors form other pens. i need help to identify correctly piston safety cap doesnt have any labeling. is it possible? or is it replacement cap? nib has 244 marking. feed is not a montblanc part? it has 3rd tier clip? http://i.imgur.com/D9OAZwL.jpg