For S 201 (ex TM-52) & S 202 (ex TM-53) have a look here: https://www.historisches-marinearchiv.de/projekte/s_boote/lebenslauf_boot.php?where_value=186 https://www.historisches-marinearchiv.de/projekte/s_boote/lebenslauf_boot.php?where_value=187 They were both sold to Bulgaria, getting renemed i...