frobozz
Subscriber
A search here shows occasional questions about the goofy assortment of filters available for these things, so I thought this might help: the original info sheets from Thomas.
http://www.backglass.org/duncan/darkroom/thomas_duplex_super_safelight_instr.pdf
Duncan
http://www.backglass.org/duncan/darkroom/thomas_duplex_super_safelight_instr.pdf
Duncan