Okay, here's what I found with a little cleaning. You were right Eric, that Fuchs fox is easily covered by crud. I had the part # on the early wheel cleaned up, but
just below was that fox hiding under some more dust.
The first two pictures show the part # and size/dimensions of the early 911.361.020.43 wheel. Note how there is no offset stamped in the early wheel (there's no ET stamp anywhere- trust me this time).
The second two pictures show the part # and size of the later 911.362.113.00 wheel. Note how the 00 or 90 left out of the end of the part # (no, I didn't crop it from the picture). There's the ET 36 stamp not present on the early wheel.
This next picture shows the difference in the petals of the wheel. Left is the early wheel, right is the later wheel. Look at the petals on the early wheel. They're broader and smoother at the end. The later wheel petals are narrower and more pronounced at the end.
This next picture shows the location on the wheel at the top of the spoke opening near the lug hole. Early wheel is on the left, later on the right.
It appeared to me that the distance from the top of the wheel opening to the edge of the lug hole countersink (indicated by the red lines) is different on the two wheels. So, I used a pair of calipers to measure each of the five distances on each wheel. My measurements indicated the distance on the early wheel was about 0.1" smaller than that of the later wheel.
You can also see in this picture how the tips of the petal (at the hub of the wheel) on the early wheel are a bit wider and flatter than the sharper, narrower tips of the later wheel.
These last pictures and drawing show the lip and cross section at the end of the petals.
The lip is right where the petal end goes from the painted black area to the anodized section of the rim. Early is on the left, late is on the right and bottom.
The early wheel has a comparatively shallow lip (about 0.05") where the later wheel has a noticeably taller lip (about 0.12").
The goop on the later wheel is petroleum jelly by the way.
Another thing I noticed was the cross section of the outer rim was shaped differently. The early wheel is on the top, late is on the bottom of the handmade drawing. When you feel the rim down in the valley, you can feel a bump in the flat area that's not there on the later rim. This bump is present around the entire perimeter of the wheel. Weird.
That's all i've noticed so far. So there seems to be a clear difference between the early and late 16x6 wheel.
If anybody cares......................