The McCormick 3680253M91 Counter Tachometer is a genuine OEM replacement part designed for various McCormick, Case IH, and New Holland agricultural tractors. This essential component provides precise engine speed and operational hour readings, crucial for maintenance and performance monitoring. Engineered for durability and direct fit, it ensures reliable functionality across compatible models, including McCormick CX, MC, MTX, and XTX series, as well as specific Case IH JX and MXM series, and New Holland TL and TLA series tractors.