For sale MA259 dual oven 5, 1, 0.1 MHz frequency standard. Oscillator and power supply. Condition: used, working unit. Rack mount.Very good price. see the manual to: http://ko4bb.com/Manuals/Racal/Racal_MA2595Mc-s_Precision_Frequency_Standard.pdf Contact me directly, I can send picture. Luciano, timeok at timeok.it