yes,that's an oc version tech but it has the post war design based base plate with the early zamak cap like this one.
1949/50? brit post war ball end tech no etching/gillette insignia on cap.but identical to later thick caps with frosted etching originally scored in a late #44 case. could be someone's build up..
1938 - 1940 restored Senator razor set. Case restored by @jimjo1031 and razor replated by backroadsgold.
#25 brit fb/oc tech here with the french solid thin handle.one piece,not tube and pressed in collar like the brit thin handles one nimble shaver