When we searched for the exact name of Uryn Pavin there were three possible results that came up. One of the boys was not born between the dates we were looking for (1927-1933) so we eliminated that option. The other two results were both born in 1927 and they both had the same address so we figured that it was the same person. The occupation was listed as Schueler, which seemed to further support that this could be the boy we were looking for.
We found an exact boy with the same name and birth year in the Lodz Ghetto Labor Cards. From the labor cards it says that Uryn Pakin would be employed as an apprentice in the Metal Department, operation #37. It says the (Arbeitet seit), which we believe translates to the date he started working is on October 14, 1942.