Smith's Chronometric 💙🇬🇧💙 Smith's Chronometric speedometer is a vintage speedometer known for its accuracy and use of a clock-like mechanism for measurement. It utilizes a chronometric or clockwork mechanism, specifically an escapement mechanism, to indicate speed at intervals of 0.75 seconds. This design was particularly favored in aircraft and racing cars due to its precision, which was crucial for performance and safety in those applications. | OLD Madras Motorcycles