Repairable movement? Or not worth the trouble?

I suspect that the answer to this is that one can't be sure until the movement is disassembled, but if anyone wants to share their gut feeling about this movement, I'd appreciate it. Unfortunately, my long-time watchmaker friend has completely retired and sold off his entire shop, so I don't really have anyone local to take a look. I'd have to ship it off, and I want to make an educated choice. Try to get it running and possibly make it into a complete watch again eventually? Or just leave it as is, and possibly scavenge parts off of it in the future, if they're worth scavenging.

This is an IWC Ingenieur ref 666 with cal 853 that I mainly bought to use the dial to replace a repainted dial in a family watch. But I also have the case and movement, so I'm thinking about what to do with them. The watch winds and sets, but does not run. It looks pretty bad, but if it ticked, I'd feel better about a potential restoration.

The case obviously exhibits a LOT of corrosion, and I can see some rust in the movement as well, so that's a concern. The balance does not move freely and when I look closely, the hairspring looks funny, like part of the coil has come up out of the correct plane. I've tried to include some macros. Some are slightly out of focus, but if you look at all of them, I think you get a sense of it.

Dial photo at the end to satisfy any curiosity. It's not the greatest, but it's original and better than what I have.

Many thanks for any thoughts.

IWC is a quality brand.

I have not really done much searching on scrap parts as IWC is a bit more on the premium smaller scale runs side of things. They did not show up in the bargan bins at the NAWCC marts 30 years ago. I was impressed on the factory tour and see them as being on par with Omega and the other Swatch (aka SMH) group companies. I would not mind an IWC for my collection just because I visited the factory. I did also visit AP and JLC so some of this is wishful fantasy.

From a Hobby perspective the movement in the photos is quite repairable. A little rust never bothered me. Everything is present so a cleaning should get it ticking again.

Getting back into pristine shape depends on how much wear/rust there is under the dial. This is the sort of watch one sees on You Tube shakedowns.

What ever the case (no pun intended.) This watch will be a total timesink, So repair will be expensive and probably comparable to factory restoration.

Fair point, but I will be looking for dials anyway. Hopefully, I will eventually find a better one for my other watch, and this one will be available again. So I'm going to consider the dial to be a separate issue, hypothetically. 😀

I don't think it would be worth restoring this one based on the repainted dial it will end up with, and the condition of the case. I would keep it for parts though.

Thanks for the feedback so far, the comment about the hairspring made me hopeful, find a new balance is something that I would like to avoid.

Regarding the crystal, unfortunate there is extensive crazing, it's not just superficial.

TBH, the movement itself seems like it shouldn't be too bad, the rust/water intrusion actually is probably not going to have much problems inside of it.

The hairspring scares me/makes me less confident in MY ability to fix it, but the rest is probably not too bad to fixup. IF it wasn't for that, I'd offer to see what I could do for the cost of parts 😀

I think that is a bit off to the side of where a crown wheel would go. I think that is a ratchet that is part of the automatic works. I think I've seen a Longines with a similar feature not long ago...