|Born||June 17, 1896|
|Died||April 17, 1970 (aged 73)|
Petersson performed national service at the I 16 regiment in Halmstad, Halland, between 1916 and 1918. Mandel Karlsson, the protagonist of 91:an, is based on two people Petersson met during his national service at I 16 — a blond and ill-tempered Smålandian who was turned soft by accordion music, and a friendly, short haired person. Some of the attributes were switched and the result was 91:an and another character, 87:an Axelsson. Several of the officers in 91:an are also based on real people Petersson met during his service.