Answer:
1. The link that has links of london engraved on it should be considerably bigger than all other links, and the 3 engraved links of the silver band should be oval not circular!!!!
2. The Charm key rings should be directly opposite the links of london silver band, and there should be 6 of them. with 3 links separating each charm link.
3. it is shinier and heavier than the fakes. ;] Hope I helped.