.32 caliber Iver Johnson revolver
E723139
The .32 caliber Iver Johnson revolver is a small, inexpensive early-20th-century American handgun best known as the weapon used by Leon Czolgosz to assassinate U.S. President William McKinley in 1901.
All labels observed (2)
| Label | Occurrences |
|---|---|
| .32 caliber Iver Johnson revolver canonical | 1 |
| Iver Johnson "Safety Automatic" revolver line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8277992 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: .32 caliber Iver Johnson revolver Context triple: [Leon Czolgosz, usedWeapon, .32 caliber Iver Johnson revolver]
-
A.
Samaritan revolver
The Samaritan revolver is Hellboy’s iconic oversized, mystical handgun known for firing powerful, supernatural ammunition against occult threats.
-
B.
Enfield No. 2 revolver
The Enfield No. 2 revolver is a British .38-calibre service handgun widely issued to Commonwealth forces during World War II and known for its robust, utilitarian design.
-
C.
Derringer pistol
The Derringer pistol is a small, easily concealed single-shot handgun historically infamous as the type of weapon used to kill U.S. President Abraham Lincoln.
-
D.
.38 Special
.38 Special is a widely used revolver cartridge known for its manageable recoil and long-standing popularity in law enforcement and civilian self-defense.
-
E.
Remington rifle
The Remington rifle is a family of American-made, bolt-action and lever-action firearms widely used by military forces and civilians worldwide from the late 19th century onward.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: .32 caliber Iver Johnson revolver Target entity description: The .32 caliber Iver Johnson revolver is a small, inexpensive early-20th-century American handgun best known as the weapon used by Leon Czolgosz to assassinate U.S. President William McKinley in 1901.
-
A.
Samaritan revolver
The Samaritan revolver is Hellboy’s iconic oversized, mystical handgun known for firing powerful, supernatural ammunition against occult threats.
-
B.
Enfield No. 2 revolver
The Enfield No. 2 revolver is a British .38-calibre service handgun widely issued to Commonwealth forces during World War II and known for its robust, utilitarian design.
-
C.
Derringer pistol
The Derringer pistol is a small, easily concealed single-shot handgun historically infamous as the type of weapon used to kill U.S. President Abraham Lincoln.
-
D.
.38 Special
.38 Special is a widely used revolver cartridge known for its manageable recoil and long-standing popularity in law enforcement and civilian self-defense.
-
E.
Remington rifle
The Remington rifle is a family of American-made, bolt-action and lever-action firearms widely used by military forces and civilians worldwide from the late 19th century onward.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | revolver ⓘ |
| actionType |
double-action
ⓘ
top-break ⓘ |
| ammunitionType | .32 S&W ⓘ |
| associatedBrand |
Iver Johnson "Safety Automatic" revolver line
ⓘ
linked to:
.32 caliber Iver Johnson revolver
|
| associatedWith |
Buffalo, New York
ⓘ
linked to:
Buffalo
Pan-American Exposition ⓘ |
| barrelLengthClass | short barrel ⓘ |
| caliber | .32 caliber ⓘ |
| category | civilian handgun ⓘ |
| collectibleStatus | historical collectible firearm ⓘ |
| concealability | easily concealable ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| distributionChannel |
hardware stores
ⓘ
mail-order catalogs ⓘ |
| era | early 20th century ⓘ |
| event | assassination of William McKinley ⓘ |
| eventDate | 1901 ⓘ |
| firingMechanism | hammer-fired ⓘ |
| frameMaterial | steel ⓘ |
| gripMaterial | hard rubber ⓘ |
| historicalSignificance | assassination weapon of a U.S. president ⓘ |
| intendedUse |
concealed carry
ⓘ
personal defense ⓘ |
| legalStatus | subject to U.S. federal and state firearms laws ⓘ |
| manufacturer | Iver Johnson Arms & Cycle Works ⓘ |
| marketPosition | inexpensive handgun ⓘ |
| mechanicalDesign | swing-out ejector star in top-break frame ⓘ |
| mechanicalOperation | break-open frame for loading and unloading ⓘ |
| notableFor | use in the assassination of U.S. President William McKinley ⓘ |
| priceClass | low-cost firearm ⓘ |
| productionPeriod |
early 20th century
ⓘ
late 19th century ⓘ |
| safetyFeature |
hammer-the-hammer safety
ⓘ
transfer bar safety ⓘ |
| sizeClass | small-frame revolver ⓘ |
| soldAs | pocket revolver ⓘ |
| typicalCapacity | 5-shot cylinder ⓘ |
| typicalFinish |
blued
ⓘ
nickel-plated ⓘ |
| typicalSights | fixed iron sights ⓘ |
| useContext | urban self-defense ⓘ |
| usedBy | Leon Czolgosz ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: .32 caliber Iver Johnson revolver Description of subject: The .32 caliber Iver Johnson revolver is a small, inexpensive early-20th-century American handgun best known as the weapon used by Leon Czolgosz to assassinate U.S. President William McKinley in 1901.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
.32 caliber Iver Johnson revolver
→
associatedBrand
→
Iver Johnson "Safety Automatic" revolver line
ⓘ
linked to: .32 caliber Iver Johnson revolver