![](http://www.alamy.com/thumbs/6/5679E367-010A-4E07-BCE8-C9D6DA4016C0/2CBAE21.jpg)
Seated Man Demonstrating Vertical Sliding Window Model, late 1850s-60s.
Size: 4960px × 6974px
Photo credit: © Heritage Images / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: &, /, 19th, applied, art, black, builder, century, color, demo, demonstration, guy, heritage, job, male, man, mechanism, men, met, metropolitan, model, museum, nineteenth, occupation, people, photograph, portrait, profession, salesman, sample, sash, tintype, unknown, victorian, white, window