Without deliberately trying, I seem to have collected a few "Limited Edition" watches - mainly purchased because I preferred them to the standard version, and I was able to buy them without paying much of a premium:
1. Planet Ocean LiquidMetal - limited to 1948. Although that sounds like a lot of watches, and they are not rare on watch forums, I've yet to see another one in real life..
2. Speedmaster 50th - limited to 1957. Again, a large batch size, but I preferred this to the authentic moon watch because of the sapphire front and back, enamel dial and coaxial chronometer hacking movement. Being a shallow person, I was also influenced by the packaging.
3. Sinn 358 Jubilaum - a run of 500. Despite travelling to Germany almost weekly, I'm yet to bump into anyone else wearing a Sinn, never mind a limited edition Sinn. This one was attractive to me because it has a 60 minute chronograph with only two sub-dials.
4. IWC Vintage Ingenieur Laureus Edition - limited to 1000. I just preferred the dial colour - simple as that.