Welcome to the Vintage Fever Thermometers Store

Sometimes the old ways truly are better. When it comes to taking an accurate temperature, vintage mercury thermometers have stood the test of time.

Modern digital thermometers can give inconsistent readings, leaving you unsure what’s correct. A mercury-in-glass thermometer keeps it simple — no batteries to fail, no electronics to glitch. Just proven, precise temperature measurement.

Whether you choose an oral mercury thermometer or a glass rectal thermometer, these classic instruments are known for their reliability, clarity, and durability. Many remain accurate decades after they were made, making them an essential tool for those who value preparedness and craftsmanship.

Store/Oral Mercury Thermometer
E. Kessling “Firstaid” Oral Fever Thermometer – Aluminum Safety Case with Chain & Pin
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E. Kessling “Firstaid” Oral Fever Thermometer – Aluminum Safety Case with Chain & Pin

$29.99
In stock
Product Details
Brand: E. Kessling
Quanity Available: 1
Model: Firstaid
Type: Clinical fever thermometer (liquid-in-glass)
Bulb Type: Long Cylindrical (Oral)
Scale: 90–108 °F (arrow at ~98.6 °F)
Case: Twisted aluminum safety case with threaded cap, chain, and safety pin
Compliance Mark: Mass. I Seal
Era: Mid-century, likely 1940s–1950s
Origin: N.Y. / Massachusetts marked stem
Condition:: Used - Very Good

Vintage E. Kessling Firstaid oral fever thermometer with an eye-catching twisted aluminum safety case and attached chain with safety pin. This classic liquid-in-glass clinical thermometer features a 94–108 °F scale with red numerals and a long cylindrical oral bulb.

The stem is marked “E. Kessling, N.Y. Mass. I Seal Firstaid 1 Min” with serial number 748025. The aluminum case gives this piece a distinctive early first-aid and travel-kit look, making it especially appealing for collectors of vintage medical instruments and unusual thermometer cases.

A strong display piece with more visual character than a standard pen-case thermometer.

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E. Kessling “Firstaid” Oral Fever Thermometer – Aluminum Safety Case with Chain & Pin
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