Antique.has rare tubes.1940s to early 50s.
Sandborn Viso Cardiette portable seimic and heart EKG recorder.
Excellent condition.Valve vacuum tubes.Has a full roll of hard to find graph paper.These were extremely well built and were said to be reliable.
Great conversational rare vintage medical piece.look on e BAY as sometimes they pop up.
Very interesting history.
Cash offer or trade for 1970s stereo equipment.
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