Here are the three kerosene generators available in the day for Coleman, two of these were also marketed for gasoline. . Q99 was utilized by installing a smaller tip than gasoline. As early as 1917. . R55 in the mid 1930 era was utilized by an air tube restriction insert. . QK 99 double loop which began shipping in 1929 also designated as SQK 99 for “Sunshine” continued to be listed in Export catalogue 1935. . . . . Larry