Pair of polished and lacquered port and starboard boat lanterns by Den Hann of Rotterdam Holland. Nice sturdy pair with clear Fresnel lenses in red and blue filters. With hinged rear doors, brass carry handles and mounting brackets. Den Hann was founded in 1922. These are circa 1950. Great Pair Weight: 2 lbs. Each Overall Dimensions: 8"H x 6"W x 5"D each Made: Holland Material: Brass Date: 1950.