OpenTwo archives, queried live.
Every record below comes from The Met or Smithsonian Open Access and was filtered on that archive’s own rights field before it reached this page. 22 shown for “Pioneer Instrument Co.” — 64 records examined, 38 dropped by the rights gate.
Archives queried 2026-09-05 23:04 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
"Amaryllis Fleming" Cello
Brothers Amati · 1610–20
Sun Compass, Bumstead
Pioneer Instrument Co.
Pair of Candelabra
Tiffany & Co. · 1884
Drift Meter, Navy, Pioneer
Pioneer Instrument Co.
Idiophone with an iyọ́bà
Ìgbèsànmwà (ivory- and wood- carving guild) artists · 18th–19th century
Plotter, Protractor, Pioneer Instrument, Mark II
Pioneer Instrument Co.
The Bryant Vase
Tiffany & Co. · 1876
Venturi Tube
Pioneer Instrument Co. · ca. 1920
Baystate Presentation Banjo
John C. Haynes & Co. · ca. 1890-1895
Altimeter
Pioneer Instrument Co.
Cornu (reproduction)
Artist not stated in the record · late 19th century
G-Meter / Accelerometer
Pioneer Instrument Co. · 1934
Suzu
Artist not stated in the record · 17th century
Venturi Tube
Pioneer Instrument Co. · ca. 1920
Saint Lawrence Standing and Holding the Grill, Instrument of His Martyrdom
Marcantonio Franceschini · ca. 1715
G-Meter / Accelerometer
Pioneer Instrument Co.
Man Seated at a Keyboard Instrument
François André Vincent · 1774
Indicator, Manifold Pressure Warning System
Pioneer Instrument Co. · ca. 1934
ex "Kurtz" Violin
Andrea Amati · ca. 1560
Indicator, Fuel Quantity
Pioneer Instrument Co. · 1936
Indicator, Manifold Pressure Warning System
Pioneer Instrument Co. · ca. 1934
Recorder, Air Distance
Pioneer Instrument Co. · ca. 1922
Where these records came from.
Two archives are wired, and only two. Each one is filtered on its own rights field — never on a title match, and never on the presence of an image file.
- The Met Collection API (Open Access)Rights field:
isPublicDomain. 665 matched · 24 examined · 14 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.10 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 234626 matched · 40 examined · 24 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.12 shown
These figures describe the pass run at 2026-09-05 23:04 UTC, during this request. A completed pass is kept for 24 hours and replayed for an identical search, which is what keeps repeated queries inside Smithsonian’s 30-requests-per-hour allowance. A pass in which either archive failed to answer is never kept — an outage must not be replayed as though it were a finding about the catalogue.
Wikimedia Commons and the Library of Congress are deliberately not wired. Wikimedia was confirmed, on a live query, to return CC-BY material inside the same result set as genuine public domain works, and filtering it safely has not been designed yet. loc.gov was blocked by bot detection during the source evaluation, so its rights vocabulary has never been observed — and nothing here is built on a field nobody has read.
An image file is a rights claim. It never travels without its field.