In what seems to be a never-ending string of “gold” iPhone 5S part leaks, new high-quality videos analyze what appear to be legitimate rear shells for the upcoming iPhone 5S

In the video above, Jonathan from TLDToday compares the internal structure of the iPhone 5S casing to that of the iPhone 5, pointing out notable changes and additions that make the current iPhone assembly incompatible with the new case. Notably, the area reserved for the battery has increased in volume, with the logic board screws being repositioned, reducing the amount of space for the logic board and chipset. This isn’t unprecedented, considering that ‘S’ model phones typically focus on under-the-hood improvements, rather than user-facing design changes. Also of note in the video is the iPhone 5S’s enlarged LED flash cutout, leaving room for the previously mentioned dual-LED flash.

In another video from DetroitBORG, we see the iPhone 5S shell compared not only to the iPhone 5, but to the ‘iPhone 5C’ casing as well. Of note here is the size difference between the 5S and 5C, with the lower cost model being noticeably larger in all dimensions when compared to the iPhone 5S. This gold casing also features chamfered edges which are anodized silver, not gold, leading to the assumption that this casing is certainly an early prototype or an unfinished design. Like in previous leaks, we can also see the thinner font being used on the back of the casing, in line with Apple’s initiatives for iOS 7.

Finally, in the third video above, we get a look at the recently speculated graphite edition of the iPhone 5S. While visually similar to the black and slate iPhone 5, the graphite edition is noticeably, but not dramatically lighter in color. It’s worth noting that early slate iPhone 5 prototypes were much lighter in color as well, and more closely resembled this graphite version.

Apple is expected to announce the iPhone 5S and lower-cost, colored iPhone 5C at its upcoming September 10th event.

More gold iPhone shell photos can be found below, courtesy of TLDToday.