All ATR panels have a number written like "xxxVU", eg the external panel for operating the cargo door is 5001VU.
The Electrical rack behind the Copilot is 80VU with the individual shelves named 81VU, 82VU, 83VU etc. and behind the captain the naming is 90VU with the shelves called 91VU and etc.
It wouldn't happen to be a Eurocopter product?
139, 306, 319, 320, 321, 332, 34A, AN2, AT4, AT5, AT7, 733, 735, 73G, 738, 739, 146, AR1, BH2, CN1, CR2, DH1, DH3, DH4,