The instrument is exactly 440μA and it has the correct internal resistance.
This instrument is 122x100mm, closely the same dimensions as the original and fits nicely in AVO models MkI and Mk II (please check pictures).
It doesn't have the rear window for the lamps.
The fixation is done with 4 large washers not provided.
AVO instruments are very sought after and a working instrument is extremely expensive.
You might find one with a damaged meter or without it for a decent price.
Contact if you need help or have questions.
The price includes tracked shipping to any part of the world.