Black Flag Debut 4 Song E.P./SST 001/Slash Magazine 1979

Looking at Slash Magazine Vol. 2, No.8 (David Thomas cover), I came across the following small ad in the back. I kinda doubt this is the first SST print ad as it contains the now iconic font Raymond used/created (?) on flyers throughout 1979 and on the "Jealous Again" ep the following August. Also the ad is nearly a year from the e.p.'s release date. Can anyone confirm where an earlier and different print ad appeared?