The drawing appears to show the early cage with a later style derailleur (the flat bracket for the later style opposed to the the rod on the earlier versionGashep,
So you can make your own judgement, here is a photo of an original cage next to one of the NOS replacements on one of my derailleurs.
The drawing which I saved from somewhere suggests that the replacement may actually be an earlier version. Can't vouch for it's veracity though.
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