This is a genuine NOS Suzuki piston, part number 12110-28613 12110-28612, for a 1974 or 1975 TM100. This vintage part is OEM original and has never been used. It is a great find for anyone restoring a classic Suzuki motorcycle. Made in Japan, this piston is of high quality and is sure to fit and function perfectly. Don't miss the opportunity to add this rare part to your collection. BX24