Isn’t this Ruth Exhibit from 1925
 

I’ve seen discussions on this series. But my understanding is that there are 3 different backs which are blank, and two postcard style sayings. Plus this series should be 1925-31 unlike the listed 1926-29 traditionally referred as. So, are all blank backs done early in the series which makes this card from 1925? Is my logic correct or close?

Not my card as I was the under bidder in the last HA auction.