Army flak badge by Foerster & Barth, Pforzheim. Feinzink construction with soldered on set up.Maker marked with the LDO code of F&B "L/21" on the pin, mid to late war example by the F&B company. Typical thick needle reverse. Good condition with normal signs of age. No repairs, no damage. 

VERY rare maker marked example of a F&B army flak badge. Premium piece!