Code:
kindletool convert -i Downloads/lpad-pkg-001c/update_launchpad_0.0.1c_k3w_install.bin ──(Mon, Feb 02)─┘
Checking update package 'Downloads/lpad-pkg-001c/update_launchpad_0.0.1c_k3w_install.bin'.
Bundle FC02 (OTA [ota])
Bundle Type OTA V1
MD5 Hash a3efbd18d0cced491acb3f95cd74e62e
Minimum OTA 0
Target OTA 2147483647
Device Kindle 3 Wifi
Optional 0
Padding Byte 19 (0x13)
So, apparently, yup, that's the right one.
You're welcome to check if MRPI dumps it as incorrect too, because that's weird. 3.4.1 hasn't touched anything even remotely related to OTA updates.