The 'MF' is possibly for Michael Flürscheim.
With thanks to John A for these pics. With cocking tool, which is also used for stripping the pistol. The small loop handled item is a turnscrew for the adjustable trigger and the other steel item in the box is a spare leaf or plate spring for the trigger mechanism.
With thanks to John G for this pic.
With thanks to John Z for this pic:
Model MF - Owners Manual.
This very rare item (the literature not the pistol) was seen on eGun last year.
There follows a couple of (not very successful) attempts to make the English part of the manual more readable. Apart from the last sentence, the English translation is pretty good.
It's interesting that the manual explains the presence of a countersunk hole in the cocking device - it is for attaching it to a post or tree to assist with cocking.
EG pellet box with MF illustration
With thanks to WestleyR on the AVA for this pic.
Very strange translation here!