My understanding is the hollow grinds with a double stabilizer heel did not start to show up until the 1870's. B. J. Eyre & Co. used the Late Greaves stamp for only a few years after they acquired the Greaves company. That would put this blade/grind about 20 years earlier. Many blades were professionally reground later in their life but I do not recall ever seeing a reground blade with the show face etched. An interesting razor.
Any thoughts?
Name: hollow grind B.J. Eyre.jpg Views: 187 Size: 50.6 KB