Cupertino is leaking like a rusty sieve these days. If this video is to be believed, you are looking at the new case for the iPhone 4G.

The Gizmodo iPhone episode is all over save for the legal repercussions, but at the time many people hypothesized that the lost prototype was actually one of several possible choices for final case being tested by engineers.

This case is similar in shape to the iPad, with squared off edges and an aluminum back surface. Apple products tend to mimic each other as manufacturing and prototyping techniques evolve.

The video doesn’t show too much, and the parts are not assembled, but this seems entirely plausible as Apple’s final choice for iPhone 4G casing. Do you think this is legit? Let us know in the comments.