C.1910s Edison Mazda uncoiled tungsten cage fil. light bulb cobalt blue w. heavy copper fil. supports, Spreckels Theatre, from San Diego CA ($40 b.i.n., $7 sh.) mar-2021

Tipped Sunbeam Mazda cobalt blue uncoiled tungsten cage filament light bulb from Wilton ME ($29.50, $10 shipping) sep-2021

Tipless Edison Mazda uncoiled tungsten cage filament light bulb cobalt blue with sleeve 40w 110v from Alexandria VA ($51) jan-2021

C.1928 Westinghouse Mazda tipless cobalt blue coiled tungsten filament light bulb 75w 120v, working, from Mechanicsburg PA ($18, $5 shipping) dec-2021

C.1930s cobalt blue coiled tungsten filament light bulb from Marina CA ($21.50, $9 shipping) feb-2021

Cobalt blue carbon filament heat bulb with cone coil element, probably NALCO, from Garden Grove CA ($45 not sold) sep-2021

Cobalt blue carbon filament infrared heat bulb 260w 115-120v, NALCO North American Electric Lamp Company St. Louis MO, from Orland Park IL apr-2021

Cobalt blue Nalco round carbon heat bulb 200w 115v from Marina CA ($24.50 b.i.n., $9 shipping) jan-2021

Lot of bulbs, 2 tungars, 1 cobalt blue heat bulb, 1 Cold Cathode Rectifier tube 120v to 90v 40mA MESCO Manhattan Electrical Supply Co. Inc., from IL ($15 b.i.n., $12 sh.) mar-2021

Round tipless cobalt blue 4-loop carbon filament light bulb 225v 100w 32K from Germany feb-2021

Lot of 12 small carbon fil. light bulbs for marquee signs incl. 3 in very rare amber glass, 4 clear with frosted tops, 2 cobalt blue, 2 green, from Waldoboro ($157.50, $17 sh.) may-2021

Lot of 6 Edison GEM tipped carbon filament light bulbs dipped in blue paint, 5 have continuity, 6 wrappers included, from Waldoboro ME may-2021

Lot of 8 small tipped carbon hairpin fil. early xmas christmas light bulbs C7 14v, some made in Japan, 3 cobalt blue, 2 milkglass white, 3 ruby red, from Deming NM jul-2021

Pair of large cobalt blue mushroom shape coiled tungsten filament light bulbs, untested, from Jackson MI ($26, $12 shipping) jun-2021

Lot of 3 large coiled tungsten filament light bulbs, Duro-Test 150w, two ruby red, one cobalt blue, all untested, from Jackson MI ($33, $12 shipping) jun-2021

Pair of tipless cobalt blue Nalco carbon filament light bulbs 16cp 110-115v from Madison AL ($20, $9 shipping) feb-2021

Porcelain shell TH Thomson-Houston tipped cobalt blue carbon filament light bulb from Deming NM jul-2021

Vintage round globe cobalt blue light bulb with coiled tungsten filament 120v 60w made in Japan, from Quebec Canada ($8 not sold, $18 shipping) mar-2021

C.1915 daylight blue large tipped Edison Mazda C lamp early coiled tungsten filament light bulb 300w 112v with original box, from Parkville MD ($150 not sold) nov-2021

C.1915 daylight blue large tipped Edison Mazda early coiled tungsten filament light bulb 300w 115v with newer box c.1923, from State College PA oct-2021

C.1915-1922 Westinghouse Mazda tipped large 750w or 1000w mogul base daylight blue early coiled tungsten filament light bulb, from Rochester MN (listing e.e.) dec-2021

C.1926 box of 6 daylight blue Edison Mazda tipless coiled tungsten filament light bulbs for use in signs, 25w 115v, from Whitney Point NY ($36, $14 shipping) nov-2021

C.1928 daylight blue Vicks VapoRub vaporizer light bulb with looped carbon filament and indented top, with orig. porcelain base, non-working, from Bardstown KY oct-2021

C.1950s Kokka decorative flower light bulb, blue, made by Kokka Hana Denkyu in Tokyo Japan, from Chicago IL ($20, $5 shipping) nov-2021

C.1950s Kokka Hana Denkyu blue flower lamp bulb, made in Tokyo Japan, Pat. No. 365577, with original sleeve, from Charlotte NC ($30 not sold, $3 shipping) jun-2021

Daylight blue tipless coiled tungsten filament GE Mazda light bulb 150w 115v from Atlanta MI ($20, $10 shipping) may-2021

Daylight blue tipless coiled tungsten filament GE Mazda light bulb 200w working from Azle TX ($6.50, $6 shipping) apr-2021

Large daylight blue tipped Edison Mazda coiled tungsten filament light bulb 200 or 300w 120v, working, from Feeding Hills MA mar-2021

Tipless Edison Mazda uncoiled tungsten cage filament light bulbs ruby red and cobalt blue with sleeves 40w 110v from Alexandria VA ($64.84, $20 shipping) jan-2021

C.1885 pair of very rare colored Schaefer base carbon fil. Mather light bulbs, cobalt blue and ruby red w. colored tips, blue w. intact fil., pat. jun-16-1885, from Cobb GA sep-2021

C.1905-1910 pair of paint-dipped red and green Army & Navy carbon filament light bulbs, claimed to be railroad gate lamps by original owner, from Lake Winola PA sep-2021

Lot of 8 edison era exhaust tip christmas tree carbon filament light bulbs 14v C6 ruby red and emerald green from Deming NM apr-2021

Pair of ruby red TH Thomson-Houston tipped carbon fil. light bulbs, one Edison, one O.K. Boston, one has broken tip, untested, from Waterville ME ($26.50 b.i.n., $10 sh.) aug-2021

Porcelain shell TH Thomson-Houston tipped ruby red carbon filament Edison light bulb 16cp 106v, non-working, from Brooklyn NY apr-2021

C.1910s Edison Mazda uncoiled tungsten cage fil. light bulb ruby red w. heavy copper fil. supports, red tip, Spreckels Theatre, from San Diego CA ($40 b.i.n., $7 sh.) mar-2021

Tipless Edison Mazda uncoiled tungsten cage filament light bulb ruby red with sleeve 40w 110v from Alexandria VA ($45) jan-2021

Lot of 10 light bulbs incl. Detroit Mazda, uncoiled tungsten cage filament, ruby red glass, carbon filament, from Westlake OH ($75, $19 shipping) aug-2021

Westinghouse Mazda tipped uncoiled tungsten cage filament light bulb ruby red from Columbia SC ($35.55, $5 shipping) jan-2021

Pair of tipped Bryan Marsh Mazda uncoiled tungsten cage filament light bulbs covered in clear light red paint, from Long Grove IA ($50 not sold) sep-2021

C.1920-1922 tipped uncoiled tungsten cage filament light bulb, likely Mazda, dipped in translucent red paint, probably 25w, used to light a 1920's half-doll lamp jun-2021

Round tipless ruby red 4-loop carbon filament light bulb 225v 100w 32K from Germany feb-2021

C.1920s tipless ruby red carbon filament light bulb from Marina CA ($17, $9 shipping) feb-2021

Large ruby red tipped carbon filament light bulb from Marina CA ($39, $9 shipping) jan-2021

Ruby red tipped carbon filament Edison light bulb 16cp 115v with very rare red vacuum tip from Deming NM jun-2021