The MF67 Stock is the most plentiful and easily found on the Paris Metro. A total of 1,482 cars were built, and they currently operate on lines 2, 3, 3bis, 5, 9, 10, and 12. These cars are very similar to the MP59 stock, with the main difference being that these cars have steel wheels for use on conventional tracks, not rubber tires. There are actually six types of MF67 Stock, but the differences among them are subtle, and they are essentially one and the same. The first MF67 Stock entered service on Line 3 on December 21, 1967.