Help identify the details on the board

Hello! And what is the difficulty to determine all the details using a search on Google images or other alternative sites?

Resistors - this is most of the elements of the board - these are the yellow-green cylinders with two legs. In the corners of the board on the left (one blue and almost gray) and the blue in the middle on the right are most likely multi-turn potentiometers (which doubt is in the upper left corner).

Further on the active components:

At the top right, near the blue multi-turner, two black pieces in a semicircular body - most likely transistors, Google markings - you will know for sure. Millipede - I don’t know, I can’t see it, but if I read it correctly, the LM248N is some kind of amplifier.
UD201 - similar to a flying saucer in a silver case - is an operational amplifier. 5GR1 - Yandex says that the KT815G transistor (it is quite possible the end of the name and the beginning of the marking on the case coincide). Yes, and the case is similar.