Product Overview
Sylvania 1819 Miniature Lamps, 28V 1W T3-1/4 with BA9s Bayonet Base, 10 to a Pack
Condition
Unused, New Old Stock; clean and in excellent condition. The lamps come in the original Sylvania poly bag, still inside the printed white, red, and blue Sylvania Miniature Lamp Bulbs carton. The bag label reads SYLVANIA 1819, 37351-0, 10 LAMPS, and the end of the box is stamped CODE 373510, 1819, 10 SYLVANIA LAMPS. Under the plastic the glass envelopes are clear with the filaments plainly visible, and the brass bayonet shells are bright, each one stamped 1819 above a second, less legible line that reads as SF7. Several shells show a dark area along one side; the lamps all lie sideways in the bag, so no base end face appears in any photo. The carton itself carries shelf wear: a scuffed, mottled patch across the top face and softened corners from storage.
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Product Overview
The Sylvania 1819 is a 28V, 1W miniature incandescent lamp built on a T3-1/4 glass envelope, 9mm in diameter, with a BA9s miniature bayonet base and an average rated life of 2,500 hours. It is the small filament lamp that lit indicator panels, control equipment, and low-power signaling systems for decades, and Sylvania cataloged it under code 373510, printed as 37351-0 on the inner bag. Each pack holds 10 lamps. Miniature filament lamps like this one are nearly extinct next to modern LED replacements, and when a machine's panel was designed around a BA9s socket and a 28V bus, the original lamp is still the part that drops straight in. Limited availability - when they are gone, they are gone.
Key Features
- Manufacturer: Sylvania
- Lamp number: 1819
- Voltage: 28V
- Wattage: 1W
- Base type: miniature bayonet, BA9s
- Bulb shape: T3-1/4 (9mm diameter)
- Average life: 2,500 hours
- Sylvania code: 373510 on the box, 37351-0 on the bag label
- Quantity: 10 lamps per pack
- Condition: unused New Old Stock in original bag and carton
Applications
- Controls technician restocking spare indicator lamps for a 28V machine console
- Maintenance crew matching existing BA9s sockets in an older control cabinet instead of adapting them to a new base
- Restorer bringing a legacy test set or instrument rack back to original with a period-correct filament lamp
- Display and prop builder who wants the glow of a real filament behind a colored lens cap
Frequently Asked Questions
How do I confirm the 1819 is the right lamp for my panel?
Match three things: the BA9s miniature bayonet base, the T3-1/4 glass at 9mm diameter, and the 28V 1W rating. Those figures come from the original product listing - the box and bag print only 1819, CODE 373510 / 37351-0 and 10 LAMPS, with no voltage, wattage, or bulb-shape marking. Cross-references to other lamp numbers are not confirmed here, so check your equipment nameplate or a lamp cross-reference chart before you order.
What exactly is printed on the parts and the packaging?
The brass base of each lamp is stamped 1819, with a second, less legible line below it that reads as SF7. The carton end panel reads CODE 373510, 1819, 10 SYLVANIA LAMPS. The inner bag label reads SYLVANIA, 1819, 37351-0, 10 LAMPS. Those are the markings we can make out, and we have not added anything the photos do not show.
How many lamps come in a pack?
Ten. The bag label and the box end panel both say 10 lamps, and you get the bag and the carton it came in. No guesswork, no missing pieces.
What does "Unused, New Old Stock" mean?
It means the lamps were never put into service, but they have been sitting in storage for a long time. The glass and brass look clean; the carton shows its age. If an item has scuffs or wear, we say so - clearly and honestly.
Why buy a single pack here instead of a bulk lot on eBay or Amazon?
Because you probably need lamps for one panel, not a case of them. We sell the exact quantity you need. Shipping is $8 flat rate and free over $28, so for a pack or two the total usually lands well under the price of a forced-quantity lot, and it ships same or next business day from Idaho.
Ten filaments in a box that still wears its Sylvania code in typewriter-style print, from the era before every indicator on the panel went solid state. The next dark spot on your board is yours to light back up.
