In 1992, M-frame tennis also existed.
The tennis version has a pad on the forehead listed in the Japanese catalog.
Also, the M-frame baseball has generation1.
Red iridium lens and Rust lens have been replaced with Positive red iridium lenses and Persimmon lenses, respectively, and have been discontinued.
When the M-frame was sold in a yellow letter box, Blue iridium was the first generation and was a color similar to today's sapphire iridium. The blue color became darker from the end of the yellow letter box.
Planet-X frame color is slash only
Some lenses on the slash do not have a ventilator hole on the side of the nose
Added information.