Shimano BB-UN26 Innenlager 68mm Schale BC1,37 x 24, Achslänge ist 123mm
BC1.37 x 24. Shell 68mm. Shimano BB-UN26 Bottom Bracket. Shimano dating code, normally 2 letters, the first is the year, the second is the Month, if only one then it be the year. Can not find date code :(. ).