I wrote this for another forum or individual, so I'm offering it here...
Dog Dish were available through the dealerships for the 15" rims starting around 1963 with the advent of the J-series. You could obtain them for CJs also. My 62-73 parts book shows them along with the full hub caps. The 62 - 73 book shows both the Blue/red and the Gold/red logos available for both the f4 and V6, but it was generally known that the Gold/red went with the V6 and the Blue/red on the f4, neither of which were offered after 1971. They were usually found on the Tuxedo Park and a good example is if you can find the movie of Elvis and girlfriend driving around in his and her CJ5 Tuxes, one in a blue and one in a red. If you wanted full hub caps, you could order the spoke beauty rings to go with the dog dish which was troublesome as the beauty rings required 5 mounting clips each. When I purchased my 73 CJ5 new from Thorpe's Jeep in Sacramento, you could only get the full hub cap, also shown in the -73 book as part # 999878. All of the above required a cap without the center trademark for the front if you had manual hubs. WARNING to those shopping these: there were 2 sizes of them in both color options. The smaller, which is only about an 1/8" difference, will not snap onto the rim requiring the larger one. As both offered front with lockout holes, the difference cannot be attributed to the smaller being dedicated to DJs with 4-lug wheels. More likely, it is agreed that this was due to different vendors of wheels for particular production runs or year models. I hope this helps or at least contributes to other posts on this subject. Also, the gold/red ones were introduced in 1963 for the J-Series and are pictured with and without beauty rings in my Willys Motors introduction for dealers book dated 9/62.