Serial Number Question

[Frank Formeister]

Dear fellow enthusiasts - I'm a new member who has owned a Parker, that my father gave me, for many years.

Recently, I became interested in finding out more about this gun, S/N 3061. I find this same number many times on various areas of the gun but on the watertable there's a "B" in front of the 3.

Does anyone know what this means and the "F.9R. above it?

Any help or more info on this gun would be appreciated.