I read it as Mamsch with an "m" — on the filecard compare it with the m in "Kampfgeschwader" or the ones in "Tirlemont" or "Oberbürgermstr.", then with the "n" in "Brüssel-Löwen" or in "Arndstadt".
Both Mamsch and Mansch are real names, the latter somewhat more common according to searches here:
https://www.kartezumnamen.eu