Archive footage cast listings for Tri plyus dva (1963)

Soviet film Tri plyus dva (1963) includes footage from Son of Frankenstein (1939) in a transofrmative manner (as character's imagination of scenes from a novel he reads), which makes actors appearing in the sequel eligible for uncredited archive footage listings according to IMDb guidelines per the "Forrest Gump" rule: footage is re-used with vastely different context to a point where one could argue that actors should be listed as "Mystery Novel Character" rather than their character names from the 1939 movie. 

Linked for reference: scene in question, as timecoded in the officilal screeners of widescreen version and (previously more common, now curiously rare) 4:3 version (they mostly use very different take, potential eligibility as two different movies is a question for another day). 

However, I was not able to corrected existing "credit" for Basil Rathbone, nor was I able to add four other actors easily identifiable in the footage.