signal mirror:
Boer War Stereograph with Large Heliograph - Full Image
signal mirror:
Boer War Stereograph with Large Heliograph - Left Image - HDR
signal mirror:
Boer War Stereograph with Large Heliograph - Right Image - HDR
signal mirror:
1902 HMS Goliath Heliograph Stereograph (full)
signal mirror:
1902 HMS Goliath Heliograph Stereograph (left)
signal mirror:
1902 HMS Goliath Heliograph Stereograph (Right)
signal mirror:
1902 HMS Goliath Heliograph Stereograph Enhanced
signal mirror:
1905 St. Louis Exposition Signal Service Exhibit- Full
signal mirror:
1905 St. Louis Exposition Signal Service Exhibit - Left
signal mirror:
1905 St. Louis Exposition Signal Service Exhibit - Left
signal mirror:
U.S. Signal Service Field and Station Heliographs
signal mirror:
Heliograph Stereograph 1901 Johannesburg - Full Image
signal mirror:
Heliograph Stereograph 1901 Johannesburg Left Image
signal mirror:
Heliograph Stereograph 1901 Johannesburg - Right Image
signal mirror:
Heliograph Stereograph 1901 Johannesburg Left Figure
signal mirror:
Heliograph Stereograph 1901 Johannesburg - Right Figure
signal mirror:
11847– Working the Heliograph, Johannesburg Fort, South Africa - Right Stereograph Image
signal mirror:
11847– Working the Heliograph, Johannesburg Fort, South Africa - Left Sterograph Image
signal mirror:
11847– Working the Heliograph, Johannesburg Fort, South Africa - Full Stereograph
signal mirror:
1900 Heliograph: Yorkshire Signalling from New Zealand Hill, V1
signal mirror:
1900 Heliograph: Yorkshire Signalling from New Zealand Hill, V1
signal mirror:
Victorian Grenadier Guards with Heliograph (Halftone)
signal mirror:
Victorian Grenadier Guards with Heliograph (Halftone Right Panel)
signal mirror:
Victorian Grenadier Guards with Heliographs
signal mirror:
Victorian Grenadier Guards with Heliographs
signal mirror:
Victorian Grenadier Guards with Heliographs (left panel)
signal mirror:
Victorian Grenadier Guards with Heliographs - comparison
signal mirror:
11847– Working the Heliograph, Johannesburg Fort, South Africa - Full Stereograph - Sepia
signal mirror:
Back of Stereograph: 11847– Working the Heliograph, Johannesburg Fort, South Africa - Sepia
signal mirror:
11847– Working the Heliograph, Johannesburg Fort, South Africa - Full Stereograph - Sepia - Contrast Enhanced
