This part is a kind of semiconductor called 1N34.

Function of this product has 65 Volt Germanium Diode.

Manufacturers : Micro Commercial Components

Image and pinout :

Some of the text within the PDF file :

MCC
  omponents 21201 Itasca Street Chatsworth    !"# $ %    !"# 1N34A • • • Features Low Leakage Current Flat Junction Capacitance High Mechanical Strength Germanium Diode 65 Volt DO-7 O O • • Maximum Ratings Operating Temperature: -65 C to +75 C Storage Temperature: -65OC to +75OC D Electrical Characteristics @ 25OC Unless Otherwise Specified Peak Inverse Voltage Average Rectified Current Peak Forward Surge Current Maximum Instantaneous Forward Voltage Maximum Reverse Current PIV IO IFSM 65V 50mA 500mA IR=1.0mA A Cathode Mark 8.3ms, half sine D B VF 1.00V IR Typical Junction CJ Capacitance *Pulse test: Pulse width 300 usec, Duty cycle 2% 30uA 500uA 0.8pF IFM = 5.0mA; TJ = 25OC* TA = 25OC VR=10V VR=50V Measur [ ... ]

1N34 PDF Datasheet Download