Barn find but looks to be unused , would think description below is fair . This is a vintage Stewart-Buchanan brass pressure gauge manufactured in Glasgow, U.K., likely used for monitoring railway brake systems [5.2, 5.6].The gauge measures pressure in \(\text{lbf/in}^{2}\) (pounds per square inch) up to a maximum of 100 psi [5.6].The brass casing shows significant signs of patina and oxidation, indicating it is an antique or used item [5.5].
