First, the tilted card. The axis hole in the card is slightly larger than the actual axis and this allows for the card to be moved slightly so that it will balance exactly square on the brass axis before it is clamped up. I wouldn't worry about it too much unless it becomes impossible to read the car through the prism when taking a bearing. There is a facility to focus the card readings but if you can't get it in focus..... Never noticed one where the line doesn't accurately align with the small holes you show. Will the error you show make a vast distance? I'd say no, not unless you are driving a great distance across the desert using compass stops as guidance. The notch on the thumb ring is used for aligning the compass with the grid lines on the map. That glue does look a bit scrappy but it won't make any difference to the operation of the compass. If you go along the Ayer Rajah Road where our big REME Base Workshop was, you'll find zillions of these radium dials buried where we just dumped them. No such thing as health and safety radium regimes in the 60's!!!!!