I agree with Scott,
Break the bead and push the ring down, then see what you have.

I see nothing wrong with it, and very doubtful you could interchange the wrong lock ring, at least not for long.. eek

Grigg

•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-