The watthour meter looks closest to what's called an "A-base" meter in the US and Canada. Socket-based meters seem far more common here.
In a related posting you showed a 2-pole-supported transformer—any chance you know that one's kVA rating? Slang in the US calls similar mounting an "H-frame." Are the ‘pullout’-looking 415V fuses hotstick operated by the utility?
