Ghetto Lodz (1941-1943), 5 fenig 1942, Lodz, aluminum-magnesium, MEGARITY!!!
Most likely this is a design of an uncirculated Lodz Ghetto coin of the lowest denomination (5 fenigs), described in Jack Sarosiek's book, or some private issue from this period.
The coin comes with a certificate of authenticity from PGN Bialystok signed by Mark Melcer.
Aluminum-magnesium, weight 1.21 grams, diameter 20 mm, mintage unknown most likely from 3-6(7) pieces