The BC59 Series from Bomar Crystal is a RF Quartz Crystal with Frequency 32.768 kHz, Frequency Stability ±20ppm, ±50ppm, ±100ppm, Frequency Tolerance ±10ppm, ±20ppm, ±50ppm, Drive Power Level 0.1 µW, Load Capacitance 7 to 12.5 pF. Tags: Surface Mount. More details for BC59 Series can be seen below.