Pine Knot and Bluegrass were house brands of Belknap. Belknap started in Louisville, Kentucky in 1840 twenty years before the start of the Civil War;it was started by William Burke Belknap.
They had several tiers of tools the first one is the highly recognized name of Bluegrass followed by Pine Knot, Crusader and Cyclone tools.
Other companies made their hand tools like Stanley, Sargent, Barcalo-Buffalo, Thorsen, Wright,& New Britain.
Blue Grass Smoother (#1408 by Sargent)