Hi, I see that it have the fine splines for the shaft;
Splits had the bigger splines. So I think it came from a standard oval later as 55. it is howeve also possible that it camer from another car or tractor.
That is my toughts on it. even if it is younger and from a VW, it is rare...as it is standard.
Greetings.
ZELENSIS, coachbuilt body from the 50's on a vw platform made in Belgium. Peter the heb detective