Soviet technical aesthetics and technology

Hi, today I admired some artifacts of the Soviet era and wanted to share with the public. The post will not contain technical analysis or historical reference, just pictures for the curious and my notes. Therefore, publish in the "closet". (Caution: 40 Mb images!)

Electrical connector

According to legend, he and his brother "Buran" - "Storm". Please note that the wire is poured into a brown compound, a plastic cover and a hole for pouring are visible.

Surprising accuracy and accuracy of the label. I wonder how it was applied, stencil? Stamp?

The connector is connected by turning the ring with three grooves:

The pins that go into the grooves of the ring are pressed and flared from the inside, made of another metal. The metal contacts come out of the soft gasket:

It looks very technologically and cool, snaps clearly, especially after cleaning. But the ring is not very catchy, you have to work with gloves, then it connects perfectly.

Button

According to legend, this is a "button from a helicopter." It should be noted that all these things came to me a long time ago in childhood and I cannot vouch for the accuracy of the description. The button does not switch, i.e. Does not snap into place. Green ring - light storage:

Milliammeter

Marked up to 100 mA 73 year. The front panel is made of ebonite:

The case is molded from light plastic, surrounded by a metal screen:

Voltmeter

It looks like the previous one, but matting was added on the glass.

The body is of a slightly different design, the rear window is visible, it is planted on the glass sealant (possibly plexiglas). I wonder what it is for?

Voltmeter 30 v

Like the previous two devices, it has a slot for adjusting the balance for a flat screwdriver. But this device still has a second arrow, which is rigidly connected to the upper "bolt". Apparently, to indicate the optimal voltage in the system:

It is noteworthy that the body is cast! Only the rear flat cover opens. Behind the bottom incomprehensible plastic cap:

Scratched between the terminals:

If you like the format and the exhibits, then I will take pictures with pleasure.