Gender: boy
School:
School #20A
The last name Gutmacher only has two matches one of which fits Dawid's profile perfectly. Srul Dawid Gutmacher was born in 1931 making him around 11 years old when attending school #20A. So Dawid went by his middle name instead of his first name Srul.
In the notes section it says ABG 24.9.41 SULZF 90 so there was a change of registration to a new address.