Kodak Cat. No. 1521517 5½-inch diameter No. 1A (light red) safelight filter.
5½-inch diameter 1A type (light red) filter for Kodak Model A and Model B safelights.
Used Premier 5x7 Darkroom Safelight with OC type filter and mounting bracket.
Paterson omni directional safelight for use with B&W photographic papers.
OC type safelight filter for safelight housings that accept 5"x 7" filters.
Replacement FBD (yellow edge) filter set for Thomas sodium vapor Super Safelights