Naginata Mei, Bad Visibility

[Pika007]

I stumbled upon a small naginata blade, has a decent looking signature. Only problem is the visibility is bad, i'm having trouble understanding it all.

 

Full size picture-

http://i.imgur.com/4rgcCLr.jpg

 

(picture is HUGE, thus not embedded)

Third kanji is undoubtedly 子 (shi/ko)

first looks like 安　or 長 (yasu or naga)

the second one- can't make anything of it. I hereby ask for the help of more experienced members who have seen enough signatures to make something of it.

Any help is much appreciated, thanks.

[SteveM]

I think 美濃守

[Pika007]

Did you ever see 美 written like this before? personally i don't think that's the one, but it might be my inexperience talking.

[SteveM]

Yes, its a stylized 美. Its not uncommon to find it written like this in signatures. 

笹穂槍　銘　政常　美濃守藤原

[Pika007]

Makes sense now, as well as the third one, which seems to be missing a whole radical in the signature i posted. Was probably worn away with time or obscured by the second hole.

Thank you Steve! i really appreciate your help.

Too bad it means the mei is cut mid-way.