Following up rszmjt posting from a few days ago: I meant to check my P&A and post this sooner, but I'm doing it now. I have a full Chevrolet Parts and Accessories Catalog, P&A 30A, effective date Oct 1, 1970. It took me awhile to find the wheels/wheelcover (in section 5, for Brakes - Rear Axle, and Drive. Page 5-49 addresses the relevant trim rings for which I've scanned and included below in Photo 1. Note that this P&A was effective right at the beginning of the '71 model year, and end of the 1970 model year. and was less than a year from the end of '69 Camaro production.
Notice the appropriate PN at this point in time was the 9796696 which was for the 15x7 JK rallye wheel and was 2-3/8" wide. The 9796698 wheel trim was the 'serrated' or 'finger' style. This can be confirmed from the following ebay links where there are 4 of them for sale currently (NOS) in the boxes.http://www.ebay.com/itm/nos-15-inch-chevy-trim-rings-/221361583949?pt=Motors_Car_Truck_Parts_Accessories&hash=item338a2db74d&vxp=mtrhttp://www.ebay.com/itm/1969-69-Z28-GM-NOS-Trim-Rings-15-x-7-9796696-/121237108689?pt=Motors_Car_Truck_Parts_Accessories&hash=item1c3a4b77d1&vxp=mtr
These are the same PN and have the finger style retention.
J.McNeish said every original Z28 he's viewed in the last 20 yrs or so had the 4-clip style. I can say that every original Z28 I've viewed since they were new had the 4-clip style. These 4-clip styles became unavailable (new from Chevy) shortly after the introduction of the '70 Monte Carlo. If someone with a '69 Z28 wanted to replace their dented and scratched trims with new, they got the new style (with fingers).
Note: I was a young airman in the USAF during the '68-72 period, and hung with a bunch of other young airmen who were hotrodders and street racers. Several owned '68 and '69 and '70 Z28 and (a few owned Bosses, Hemi Challengers, etc). We all spent every penny of our paychecks (a bit over $100/mo) on CARS..
Factory rallyes and road wheels were the 'style' then, as not many could afford 'mag' wheels (that was the term then for aftermarket magnesium or aluminum wheels)..
My belief is that the factory designed trim ring for the '69 Z28 during production was the '4-clip' original style. I also believe that the 'finger style' was designed for the 1970 model year (typical introduction during late Aug/early Sept) of '69. As with lots of other parts used on 'late '69 Camaros, I think it is very possible that as the 4-clip style was exhausted, Norwood easily began using the 'same look' finger style as designed/mfg'ed for 1970. It's also possible that there was a 3-4 month period (Fall '69) when both styles were in use in Norwood Camaro production.
Does anyone in the group have a P&A catalog dated within the '69 Camaro production period?