Previously, there were detailed photos of this device on this forum, but they are outdated. I'm posting photos of my dm3058e, I hope they will be useful or interesting to someone.
The device itself turned out to be quite pleasant to use. Noise at measurements of 5 ppm, more digits in the interface. A fairly low temperature coefficient of about 2ppm/K. A measurement is sent to the interface in slow mode every 0.5 seconds.
The Agilent command mode works crookedly enough.