IME sometimes a shaver forgetting to clean his razor in a timely manner, following the shave, will leave a bluish etching caused .... I think ..... by the lather. I have an old Joe Rogers that is like that and it honed up fine and is a great shaver.

Beautiful razor. I've never seen a W&B made for J.Wiss of Newark. They made their own razors, scissors and other cutlery back in the old days when USA was a mfg giant. Nice score.