I did not see a capture plate under the screw in the breaker that would typically be visible if a breaker was designed for double tap use. I looked elsewhere first and I now know where to purchase these breakers ;-), but I’m only concerned if they are rated for two conductors.
In this case, there are two solid 14 gauge conductors on a 15 amp breaker.
That is the suggested repair I explained to my client if is was not rated for two conductors. It would be helpful to know if the breakers are or not rated that way and I doubt they are.
I see it quite often. We have hundreds of homes built before 1930 in our area. Unfortunately in this case they didn’t use enough of it to completely eliminate the old K&T in the attic.
Square d and Cuttler Hammer Thpe CH are the only ones I know of that is rated for two wires. These should be a small tag on the breaker listing wire size and qty if more than one is allowed.