2N5060 Silicon Controlled Rectifier.
Used on many early solid state Bally and Stern pinball machines. Used on lamp driver boards and other pinball boards.
Bally reference #E-00585-0014, E-585-14.
Stern reference #110-0074-00, 25A-5-5060.
Williams reference #5A-9014, 5130-09014-00