Yes, I mean 500khz. HP 1200B It's fine for a lot of simple signal work, makes a decent high speed multi-meter if nothing else. the time base goes down to 5 seconds a division so it can also be used to trace very slow moving waveforms (though I haven't found the need yet) Just do a google search for them, I think a hollywood set must have sold a lot of them they used for background eyecandy because there's a decent number of them out there. If you've ever seen the show Stargate and you pay attention to the backdrops in their medical/scientific labs they have enough 50 year old oscilliscope to sink the titanic =>