Hello, Andrei Valerievich! The year of birth does not coincide, there may be a distortion, a human factor. See for yourself, a report from the post-war period, or a full namesake, also matching initials of the wife.
Information from loss clarification documents
Surname Gusarov
Name Alexander
Patronymic Ivanovich
Date of birth / Age __.__. 1921
Date and place of conscription 06/27/1941 Saransk RVK, Mordovian Autonomous Soviet Socialist Republic, Saransk district
Military rank ml. beg. composition
Reason for leaving missing
Date of disposal __. 12.1941
Name of TsAMO information source
Source Information Fund Number 58
Information source inventory number 977520
Information Source Case Number 486
[DLMURL] https://www.obd-memorial.ru/html/info.htm?id=64132823 [/ DLMURL]