That's an example of probably my favorite reel. I fish mine (the 3" version) often, and when well set up they work beautifully. Unfortunately, yours looks to be in a bad way. It may have been striped for parts. from what I can see:
The Pawl and post are missing, not really a problem to make a new one but they are a slightly unusual shape.
The drag adjuster is missing. A little more tricky, but doable, five parts to machine, a lot of hand filing and 5 little screws.
The drag arm is missing. this is the heart of the reel, and would be a really fiddly job to re-make.
Most worrying of all, the boss holding the spindle bushing looks a bit odd in the pictures. It's really hard to tell, but if it's broken I'm afraid that is definitely game over.
If I'm wrong about the last point, It might be possible to cobble it together with just an un-adjustable click, and use it like that, but I fear that getting it working properly would be expensive. Worth it though, ther are cracking reels.
One thing that intrigues me, are the six pins in the winding plate, I've never seen one like that. It's usually three on the trout models, and sometimes four on the salmon sizes. It might be a later repair, or it might be an unknown (to me) variant.
Sorry to be the barer of bad news, be I fear it will be very costly to repair. to give you an idea of how much to spend, A really good, original one, in a desirable size might make £170 on a good day.
A couple of Photos of mine to give you an idea of what would need to be fabricated.
all the best,
Tim.