Olympus - Northwood
This unusual piece, above on the left, appears to be a lamp shade that did not have the center cut out for the mounting hole as it is a bowl. It's in a strong cobalt blue with rich purple iridescence and has the Northwood mark. The photo, to the right, is of an Olympus electric lamp shade in marigold. It's four inches tall. Above it, to the right, is a marigold gas fixture shade.