Tenma 72-3055 Manual

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Joined Oct 31, 2022
Buying a Tenma 72-3055 oscilloscope 2 channel 20 MHz which looks identical to a Goldstar OS-9020A; happy to have found the Goldstar manual on AAC.
Any experience with either brand of those models?
I also have a Hitachi V-212 2 channel 20 MHz recently calibrated by Tektronix. Thanks for any input.116D156D-F257-4E44-BF8E-ECCAD6409C7D.jpeg698DD5C0-869D-463A-9F25-6FD6DDD156A7.jpeg