I Need to Keep Track of Which Proof Sheets I've Posted

I need some time to take pictures of the first half of the 1973 Kellogg's baseball card set.  In the meantime, here is another proof sheet that was auctioned off without me winning it.

These first year sheets have a different format than later sheets.  These cards are in generally the second series of Kellogg's 3-D cards from the first year.  Did they just put out the next group when it was ready?

The card numbers appear in numerical order from 16 - 30.  This didn't happen in later sets.  I guess I will check these out to see when that changed.