In "Anvils in America" Richard Postman lists this as an "Old English"
anvil and one of several identical anvils built around 1830-1850.
These are identical in being built in the old manner. This will mean
you have an anvil body built up in the old manner from scrap and
assembled using individual parts for each leg, horn, etc.
He gives no indication of quality but in that period expect a steel top
plate in one or more pieces. Although very useable rebound may be less
than more modern anvils. I'd suggest inspecting carefully for repairs.
Postman makes no indication of collectable value.
How heavy is this one?