Tektronix Beckman Helipot Precision Potentiometer 30k ohm SA1400A complete

Beckman Helipot Precision Potentiometer Model A 50K Ohm 0.5% Linearity

New Beckman Helipot Model 7266 1K Ohm L .20 10 Turn Pot Potentiometer

Beckman Helipot Model 7216 R 1K L.25 precision potentiometer

BECKMAN A-R500-L.1 Helipot Precision Potentiometer 500 Ohm

Model A Beckman Wirewound Helipot 2K Ohm, 0.5% Linearity, 10 Turn Vintage

(1 pc) Precision Potentiometer, Model A, Helipot/Beckman, 500 Ohm, 5%, LIN 0.5%

Helipot 1k ohm Linear 10 Turn Precision Potentiometer