These are obviously reissues and was curious about the distortion at the beginning of Dipper Mouth Blues. No visual anomaly that would lend to the sound can be seen on the playing surface (The record is virtually blemish free and shiny). Could it have been from whatever master source that was used by Brunswick?
King Oliver, Louis Armstrong c / Honore Dutrey tb / Johnny Dodds cl / Lil Hardin p / Bill Johnson bj, v / Baby Dodds d.
Recorded in Richmond, IN on April 5 (Canal Street Blues) & 6 (Dipper Mouth Blues, aka Sugar Foot Stomp), 1923.