The Weston Temperature Indicator (-50 to 50 C) Model 728 Type 35Y1 is a precision instrument designed for measuring temperatures ranging from -50 to 50 degrees Celsius. This product, made by the brand ALT, is ideal for aviation and other applications where accurate temperature readings are crucial. With its reliable performance and wide temperature range, this temperature indicator is a valuable tool for ensuring optimal conditions in various systems. This item was found in an abandoned storage unit and is untested. See pictures for condition. Ta1