Very fine early razor. It's a full wedge with a straight handle so that puts it in the mid to late 1700's (Neil should be along soon to correct me). There were several makers that used a pipe mark, the most famous being Geo. Wostenholm but I don't think that is his but I could be wrong. Oh, and welcome to SRP. The wiki and library are excellent sources of information. I hope you stick around so that we can hear more about that gorgeous razor and how it shaves.