E.F.Johnson 154-503-1 Air Variable Capacitor 8-52pf 2.5Kv
In good working condition.
Came from a technicals college electronics lab which upgraded recently.
Shaft: 1/4" round 1.25" Long
Capacitance: 8-52pf
Peak Voltage: 2.5Kv
Sections: 2
Plates: 8 Per Section
Air Gap: 0.175"