I have a Tilley FL6 floodlight. I have been running it on 164 mantles. Looking for spares on ebay, there is a seller selling 191 mantles, apparently bigger. Erm, on Youtube there is a video of a restored one being lit, the poster mentions using f16 mantles, which are smaller than the 164s. . . . Pretty please, which is the correct mantle?
Tilley 190 and 191 mantles are the correct size, the FL., burner is smaller in diameter than the standard Tilley burner, the Tilley AL-11, AL-12 and AL-21 lamps are also fitted with the smaller burner, the link below shows the relevant page in the mantle gallery. Mantles