Basic plain sans serif font.
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Istok Web Font Suggested by Hamilton
Gothic A1 (Regular) Suggested by ZERO
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Suggested fonts
Istok Web Font Suggested by Hamilton

Gothic A1 (Regular) Suggested by ZERO

Gothic A1 (Regular) Font
It is not an exact match, but it is the closest similar font I have found. I would still appreciate the original if anyone knows it, but this is appreciated as well.
Istok Web Font (regular)
Designed by Andrey V. Panov