It's said that a smith can be identified by his hiromono. Here are several pictures of sections of a Nagamaki-naoshi that I've owned for a number of years. The Hiromono is So No Kurikara but without the Ken and it has a rendai at the tail. On the ura side are three hi one long center hi and one shorter one on each side, below the hi is a rendai and above the hi is the Bonji (sanscrit) I posted in an earlier post.
Does any one know of a smith that may have use the hiromono without the Ken along with the type of Hi?