They are 1969 Motorwheel & SPDs can be 'loose' so they are not accurate in relation to real date codes, but the car does have a 9-69 Mylar, so it was made in Sept. '69.
Moparts member Nanket gave me another one, but I still need to get the tire off of it & clean up some surface rust. No part number on it either though.
I spotted another set of 4 in a garage not long ago & I made an offer, but no word yet.......
Your wheels shouldn't have part numbers in them. Stamping the part number started in the third week of September.
