All the Frank Zappa/Mothers Of Invention 45’s from My Guitar/Dog Breath up to and including WPLJ/My Guitar should have the Reprise, Seven Arts company sleeve.
The Reprise Warner Bros. Records company sleeves go with Weasels Ripped My Flesh Radio Spots and the rest of the Bizarre/Reprise singles until and including Cletus Awreetus-Awrightus/Eat That Question.
There are variations to the sleeves, like how they are glued and the print. The use of different printing companies, equipment when they were produced is my only explanation for these differences.
Bizarre never bothered to change the Seven Arts logo on the label. If you take a look at the Reprise logo found on the Zappa Bizarre releases, you will see how it changed when Weasels Ripped My Flesh was released.
