Swap Meet Pickups (Seiko, Caravelle, Hamilton, Canoe (?))

Hello y'all.

On Saturday, I strolled over to a swap meet (flea market) nearby, and walked away with these little guys. I'll do my best to explain every one, and seeing my noobishness to vintage watches, I'm sure some aren't as good of a deal as I hoped. Regardless, I enjoy the hunt.

1. Seiko 5 Blue and Gold - Functioning well, missing crown - $20 purchase







2. Seiko 5 Grey - Not functioning - $10 purchase





3. Caravelle - Functioning, but not sure how to open case. $20 purchase



4. Canoe - Functioning - $20 purchase
Looks like it was serviced with a new mainspring 3 years ago? Any idea on this brand, age, etc?



5. Hamilton Electronic - Not functioning, missing stem and crown. $5 purchase
Totally clueless on this one. Worth looking into repairing? Case is Rolled Gold Plated, and the band is 1/20 10K Gold topped. I'm guessing that's worth nearly zilch.




Any thoughts, advice, identification, education, etc would be greatly appreciated. I'm not really a huge fan of either of these Seiko 5s or their styles, so they'll probably be liquidated. Quite frankly, the Hamilton is the only one I will keep, long-term, due to its unique style, but it's also the one most as risk of being done for good (unsure of damage within, especially with rust possibilities).

I'd appreciate any comments.

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