A new eBay purchase. A 10 MHz rubidium frequency standard fro mStanford Research Systems. It is of course used but it seems to be in good shape.

SRS rubidium frequency standard

A Stanford Research Systems rubidium frequency standard

I plan on putting this into a nice case with power supply and to build a distribution amplifier to get multiple isolated 10 MHz outputs.

Although it has a different model number it seems to be the same as the PRS10 10 MHz Rubidium Oscillator found on the SRS web site.