Thanks!

Barrel length on the longest one is 27,5", I guess because it was ordered for Africa. Not sure about the other ones as they are not mine.

The middle one is not a sporterized Greek, it is a normal 1903. But the trigger has been replaced with a Recknagel one. The apparatus above it is a Greener safety usually seen on Greener shotguns or German drillings. But it was removed when the trigger was replaced.

Yes, the third, which is mine, is a take down. More information about that rifle here: http://forums.nitroexpress.com/showflat.php?Cat=0&Number=211610&an=0&page=23#Post211610

The first is actually a take down as well, or at least it was originally before it was stocked in England, as it has the small lever in front of the trigger guard.

/C