Quote Originally Posted by Neil Miller View Post

I can see that faint first letter as either being a 'T' like Tom said or a 'P' or posibly a 'B' or 'D' but I can't see it being anything else - even the last three depend on an overhangin top serif and wear to the lower part of the character.

It could be 'Perfected' on the next line, perhaps even 'Peerless' - perhaps more pics in different lighting would help.
I can definitely see it being 'Peerless' too. Maybe it was TILLOTSON & CO? The timeframe seems about right... I've never seen that stamp, but I know there were several Tillotsons working between 1820-1840 (a few merchants as well as the more famous cutler). Also, I'd guess the age is closer to 1840 than 1820. Seems like the changeover to Victoria is about when that style of half-swaged/half-quill spine was popular.

And because I forgot to mention it, wow, that's a lovely razor!