2N3375 silicon NPN RF transistor by RCA. Package : TO-60 stud with factory fitted tag connecting the emmitter pin to the case. Download RCA RF semiconductor catalogue : Status: NOS (New Old Stock) from ex. defense contractor. Tested components: YES RoHS compliant: no Please note: these are the sought after Genuine RCA items, the 100 overlay emmitter version, which out perform later 70 emmitter versions from other manufacturers.