Hi, I am clearing out some old Porsche parts for a friend and came across a differential that I think is for somewhere around a 68 or 69 911. I can't find a part number on the diff itself, but the two joint flanges that fit on it are 901.332.209.16. The flange part numbers I can find end with a 12 and not 16, and they are will fit the 68 and 69 911, according to a Google search. I've also found some other diff parts (bearings and such) that are for the 69 911 chilled casting diff.

The only number on the diff itself, is this: 406130401. There may be other numbers that are cut off on either side due to the tab washers under the bolts. Two pics are below of the diff with one flange off and of that number on the diff housing.

I've tried registering for several Porsche forums with questions about some of the parts I'm finding, but this is the only one that has sent me a registration email. ANY HELP IS MUCH APPRECIATED! THANKS!