Kaiser-Frazer operated an assembly plant in Long Beach CA during September 1949 and re-started operations in early 1950 there. Cars assembled at Long Beach have the "A" I mentioned in an earlier post here, and the cars went to dealers in the Western U.S. Cars without an A were assembled at the main plant in Willow Run, Michigan. The post stating serial numbers (door post and body on the firewall tag) starting at 1001 was correct, so it would seem your car is the 3,742nd Special 4-door sedan produced (your earlier post with info off the firewall tag) and could have been the first 1949 Kaiser Special shipped to the original selling dealer (wherever that was) and was probably produced between August 28 and October 10, 1948 (check the SCHED number...that can translate into the date the body started down the line, but not the date of final assembly).
Jack Mueller
Club Historian