This is the original instruction manual for the CMC Model 200B frequency counter, offered here in used condition. It provides essential operational guidance, setup instructions, and technical specifications necessary for users to properly utilize and maintain this piece of test equipment. The manual is a practical resource for technicians, engineers, or hobbyists who have acquired this model and require its reference documentation. It covers the core functions needed for accurate frequency measurement. Please note this listing is for the paper manual only, not the device itself. Free shipping is included. As this is a used item, the manual may show signs of previous handling. For complete details on its exact physical state or included contents, please check the full listing description. CMC Model 200B Frequency Counter Instruction Manual. Condition: Used, Made in United States. Listed at 16.75 USD. What you see in the photos is what exactly you receive. If it's not pictured it's not included.