Please take a look at my site -
Maginot Line at War 1939-1940 - I have some photos of La Ferte. The front page has a nice photo of Block 2's GFM cupola that took a few hits from an 88mm Flak. The "Combat Operations" page had a nice photo of the AM turret. The "Combatants" page has some info and the personnel file of Oberleutnant Germer. Finally, the "Visiting the Maginot Line" page has soem "then and now" format photos.
Regards,
Marc