Allen (manufacturer)
1852, January
Allen's Improved Camera Stand

Engraving
Internet Archive
Source requested.
 
The Photographic and Fine Art Journal (New York: W.B. Smith), 1852, vol. 3, advertisement part, without page number.
Source
 
(Alan Griffiths, 20 January 2026) I'm indebted to Bálint Flesch for brining this illustration to my attention.
 
LL/72408