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]