I have a couple of old scopes, a Triumph 830 Oscillograph-Wobbulator (
http://antiqueradio.org/trium01.htm ) and an RCA WO-33A (
http://antiqueradio.org/art/temp/RCA_Oscilloscope.jpg ).
Both of them work, although I own them just for fun. When I need to use a scope, I have a modern BK Precision.