Those clips look OK but they're about 3/8" shorter than the clips on the 8 lug 19.5" wheels I have, which are same clips on original AD 17" single wheels, and other old 8 lug wheels.
Here's one of Denny's pictures that nicely illustrates the issue.
http://www.pbase.com/dennygraham/image/117149892

Back to the original question, clips for even older artillery wheels, are you suggesting the available clips from Chevsofthe40s are correct for these wheels?

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-