Silver Mar 08 Beta

Loader Version L5.07 (presumably, although the firmware does not seem to contain the loader)
Device Version v5.3.22 (this number has not been updated since the Nov-07 firmware)
Application Version TF-BETA_TEST_…. (full number is not displayed on the Topfield)
Last Update Mar 07 2008

Topfield have not hosted this firmare on their website and it is not publicly available.

Note: Newer machines supposedly have new tuner modules which required a new loader (L5.07). These machines cannot load firmwares desgined for the old loader (L4.16). However, older machines (with L4.16) can load the newer firmwares.