original gunship gray enameled four-legged stationary factory machinist stool fabricated by the lyon metallic mfg. co., aurora, il. the stool is comprised of heavy gauge cold-rolled pressed and folded steel. contains two levels or tiers of welded joint cross-bracing for added support and stability. the slightly contoured backrest is supported by two high tensile strength supports or brackets attached to the underside of the stool. measures 36 inches in height.