Not a clue.

Put it this way: If I came across your gun at a gun show,and it looked as it does in the pictures I'd take a close look at it if the asking price was $300 or less and possibly make an offer. If the asking price was more than $300 I'd keep walking. But that's just me.

At the risk of sounding overly romantic I'd say that gun has done its service and deserves a rest.

Best

Nick