You are looking at a NOS Stewart Warner twin blue 2 1/16” air / manifold vacuum pressure gauge, pt# 355W and dated H5 (Aug, 1965). This is an original, not a reproduction. VERY RARE. These were made during the same period as the popular green line gauges from the 60s. This a brand new, never used gauge made in the USA. This style is no longer available from SW.