Stanford Research Systems FS725 Rubidium Frequency Standard Precision Instrument

EFRATOM Rubidium-Vapor 10 MHz Frequency Standard (SN: 250/6244)

Rare! High Precision Low Phase Noise Large Rubidium Cell for Atomic Clock USSR

RUBIDIUM FREQUENCY STANDARD 10MHz 12dBm

Rare! High Precision Low Phase Noise Small Rubidium Cell for Atomic Clock USSR

Rb High Precision Low Phase Noise Rubidium Tube Atomic Clock Soviet Ussr DIY #Z

IC 74LS189 PROMs 3 pcs NOS USA stocked

Julie Research Labs DMR-104 1 Kohm/Step Precision Resistance Standard (SN: 93)