Help me date this W&B

I just purchased this razor for $10 and recently began restoring it. I would like to know more about when it was produced. As far as I know it is pre 1891 because it does not specify england on the tang. What I was wondering is if it could be earlier than a 1870s razor. I have included some pics to help you out. It does have some interesting markings. On the side opposite of W&B Sheffield on the tang, it has an arrow pointing towards the tail. On the blade real faintly I think I can make out medium hollow but the blade looks more like a wedge to me. Finally on the scales it says Original arrow razor. Any help would be great. Mpre pics on the way as soon as I get them uploaded.Attachment 128705 Attachment 128707 Attachment 128709 Attachment 128712