Sample GER2B is a metamorphosed, ductily deformed granitic pegmatite from the Western Bohemian Massif in NE Bavaria, Germany. Sampling location is the abandoned feldspar quarry 'Gertrud', 1.5 km NE of Obersdorf, 49.7752° N, 12.1288° E. Age estimates for the primary, magmatic crystallization are provided by a 476 +/-2 Ma garnet U-Pb age and 482 +/-5 Ma (recalculated using the revised 87 Rb decay constant 1 ) TIMS-based Rb-Sr muscovite-feldspar age based on undeformed, cm sized, primary muscovite and feldspar crystals. 5