I bought this AvoMeter Model 8 Mk V on ebay a couple of years ago, and unfortunately, a while back, the movement broke. Not sure why, but it seems beyond repair (see photo).
The rest of the electronics are fine, except for a minor repair on one of the flex cables, and a tiny bit of corrosion on the battery terminals (this cleaned up OK).
If you want it (for spares/repair), you can have it for the cost of postage (should be less than £10).