Stereo analysis
AnalyzedVerdict
Genuine stereo pair97%
The two photographs contain the viewpoint difference needed to produce genuine depth.
- Depth spread
- 4px
- The range of horizontal difference between the two views. More spread generally means more depth; 0–1 px usually indicates a monoview.
- Match
- 100%
- The share of usable picture detail that can be matched between the left and right views. A higher number means a more reliable comparison.
- Vertical
- 2px
- Vertical drift between matched details. Lower is better; 4 px or more can indicate camera movement, scan skew, or poor alignment.
A yellow-mount stereoview of the Old Wind Mill at Nantucket, Massachusetts. The shingle-clad mill has four open lattice sails and a long diagonal timber reaching a wheel at ground level. Four figures stand in and around the doorway, giving scale to the structure. Sandy tracks branch across the foreground beside rail fencing and patches of low vegetation.
The front caption reads “1230. Old Wind Mill, Nantucket,—built in 1746.” The reverse credits the photography and publication to Kilburn Brothers of Littleton, New Hampshire, and carries the separate notice “Copyright secured in the year 1880 by John F. Sylvia.” The construction date belongs to the caption’s account of the mill; the copyright notice does not establish the exact date of exposure.
An ink inscription along the reverse edge appears to read “From: Wm. Johnson” and “Nantucket Mass.” The surname is somewhat difficult to resolve, and the writer’s identity is not established. A faint pencil notation at the upper right appears to be a price rather than a title or view number.
The paired, arched-top photographs retain clear architectural detail. A small dark spot is visible at the lower-left edge of the left image; otherwise clean and sound overall.
- Title on card
- No. 1230. Old Wind Mill, Nantucket,—built in 1746.
- Medium
- Stereoview
- Subject
- Massachusetts, Outdoor Scene, Yellow Mount
- Dimensions
- 6.98 × 3.52 in (177.3 × 89.4 mm)
- Condition
- Small dark spot at the lower-left edge of the left image; otherwise clean and sound overall, with clear detail in both views.
- Provenance
- An ink inscription on the verso appears to read “From: Wm. Johnson” and “Nantucket Mass.” The surname is tentative; no fuller ownership history is established.
- Catalogue no.
- MSV1854
Catalogue details
Location
The Old Mill, 50 Prospect Street (Mill Hill), Nantucket, Massachusetts · Nantucket, Massachusetts, United States
Photographed subject · Exact site · 92% confidence
Front caption: "No. 1230. Old Wind Mill, Nantucket,—built in 1746." Reverse: Kilburn Brothers, Littleton, N.H.; copyright 1880 by John F. Sylvia. The Old Mill (1746) at 50 Prospect Street is preserved on its original site by the Nantucket Historical Association. Pin on the OSM building footprint.
