What other VW trans uses a 210mm clutch?
What other VW trans uses a 210mm clutch?
Well, I think the problem may lie in the fact that I have a 2 pin clutch/flywheel and this flywheel has a single pin (being later version) The flywheel is about 3/4" thicker as well. I assumed I couldn't use it, also my transmission is an ASF (8v) 24t shaft.
Let me know if there is some magical combination of clutch/pressure plate and this flywheel combo that will work and I might pursue it. Otherwise I am going to return it sometime.
I would still love the measurement

Everything I have read is the 2 pin is pre MKIII, the single pin is MKIII. That is what I have seen. Some have said different countries of origin of casting, but IIRC I have one of each and both say Germany.
Got a 210mm, two pin flywheel from a gas engine here at the computer with me. Laying it over a turbo diesel flywheel that is handy there is the dimple like CRSMP5 said, right next to the bolt hole, that lines up with the TDC mark on the 200mm TD flywheel, and a second machined notch a few degrees counterclockwise for the gas TDC.
The part number for the 210mm is 027 105 273; hope that helps
I would still love the measurement 
Everything I have read is the 2 pin is pre MKIII, the single pin is MKIII. That is what I have seen. Some have said different countries of origin of casting, but IIRC I have one of each and both say Germany.
2 pin is german mk3, and everything prior to that..
single pin is mexican 2.0
its not the country of origin for the part, its the country of origin for the car..
Still need that measurement even if you are returning it.