Part Number: 12B1OL (Bearing) Part Number: 12B-1OLCOT (Bearing) Part Number: 12B20 (No description) Part Number: 12B200 (Prop ammeter) Part Number: 12B20-00 (Ckt bkr 12v/20a) Part Number: 12B20-000 (Component) Part Number: 12B2000CT (Ne) Part Number: 12B200-1 (Indicator ammeter) Part Number: 12B2004 (Loadmeter) Part Number: 12B200-5 (Aircraft inst. & development pro) Part Number: 12B2005-5 (Prop ammeter) Part Number: 12B2005-9 (Prop ammeter) Part Number: 12B2007 (Voltmeter) Part Number: 12B2009 (Prop de-ice gauge)