Prison registration card from Falstad Prison Camp. Sergei Grabovsky arrived at Falstad Prison Camp in the autumn of 1944, and was a prisoner there until liberation in 1945. From The Falstad Centre Archive.

Translation:

Last name (for women also maiden name): Grabowski
First name: Serge
Birth date and place: 1910
Occupation: painter/artist
Marital status: married
National identity: …
Cover name and address: …
Political orientation: …
Religion: …
Brief description: Russian prisoner of war
Imprisoned on the: 23.8.44 from Trondheim
Management, punishment etc.:
Released on the: …