ECO oscillator is it?

Hi, this is an ECO oscillator

[found at http ://facultyfiles .frostburg .edu /phys /latta /ee /6cl6xmtr /6cl6schematic655 .gif]

I wonder if the attached, is also an ECO oscillator? I see that the circuit is similar.

Also, does the 0D3 contain radioactive materials? (the 0B2 do, according to this

http://qrp.gr/safety.htm )

I think you need to explain what ECO stands for before anyone can answer your question.

Best regards
//Harry