These arms are not marked in any way for me to tell which company made them.  In looking at other arms on eBay that are identified, I feel comfortable saying that these are Koken. Anyway, what you see in the pictures is what you are bidding on.  One arm has pretty good oak on the underside and the other one is complete enough to use as a pattern. I have always had good success removing those little rust spots with muriatic acid.  Look at all of the pictures and please ask questions if you want.  Shipping will be 40.00 to the USA.