Part Number: 1203AN (National semiconductor) Part Number: 1203AP60 (Dip8) Part Number: 1203AS100-3 (Trailer) Part Number: 1203AY-100-1020PPM (Low ppm resistor trimmer 100ohm ) Part Number: 1203AY-20-1020PPM (Low ppm resistor trimmer 20ohm 1) Part Number: 1203AY-2K-1020PPM (Low ppm resistor trimmer 2k 10 2) Part Number: 1203B (Power supply) Part Number: 1203B-1 (No description) Part Number: 1203B104K500NT (Ne) Part Number: 1203B163 (Component) Part Number: 1203B-2 (No description) Part Number: 1203B-3 (No description) Part Number: 1203B3L (Off flag) Part Number: 1203B4L (Indicatorsymbol ind)