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. 19 shown for “Violin Fingerboard Patent Model” — 64 records examined, 39 dropped by the rights gate.
Archives queried 2026-09-05 22:19 UTC · fetched live for this request
isPublicDomain field is true for this object.metadata_usage.access reads CC0 — a waiver, not an expired term.
“Eclipse 4000” model banjo
William A. Cole · ca. 1904-1906
Violin Fingerboard Patent Model
Artist not stated in the record · 1853
Archlute
David Tecchler · ca. 1725
Aluminum Violin Patent Model
Springer, Alfred · 1891
"Savart model" Violin
Ch. Michel · ca. 1819
“Horn Violin” Patent Model
Artist not stated in the record · 1854
Mandolin
Orville Gibson · 1898
Heirloom Saxon violin and bow
Artist not stated in the record · 1820s - 1870s
"Chanot model" Violin
Artist not stated in the record · mid-19th century
“Echo Viol” Patent Model
Artist not stated in the record · 1872
H-4 Artist Model Mandola (serial no. 49642)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1919
Mount “Hollow Back Violin"
Mount, William S. · 1852
K-4 Artist Model Mandocello (serial no. 26084)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1916
Violin played by the enslaved man Jesse Burke
Artist not stated in the record · 1850-1860
Style O Artist Model Archtop Guitar (serial no. 51670)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1919
A-4 Mandolin (serial no. 39051)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1917
F-2 Mandolin (serial no. 229224)
Gibson Mandolin-Guitar Manufacturing Co., Ltd. · 1916
Bowed Mandolin
Joseph Collingwood · ca. 1900
Banjo
Benjamin Bradbury · ca. 1885
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. 24 matched · 24 examined · 6 dropped by the rights gate. Kept only where isPublicDomain === true and a file URL was published.12 shown - Smithsonian Open Access API (api.si.edu)Rights field:
content.descriptiveNonRepeating.metadata_usage.access. 40371 matched · 40 examined · 33 dropped by the rights gate. Kept only where metadata_usage.access === "CC0" and an image resource was published.7 shown
These figures describe the pass run at 2026-09-05 22:19 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.