A few nice image url images I found:
[Unidentified soldier in Union uniform with pocket watch] (LOC)
Image by The Library of Congress
[Unidentified soldier in Union uniform with pocket watch]
[between 1861 and 1865]
1 photograph : sixth-plate tintype, hand-colored ; 9.5 x 8.5 cm (case)
Notes:
Title devised by Library staff.
Case: Berg, no. 1-54.
Use digital images. Original served only by appointment because material requires special handling. For more information see: (www.loc.gov/rr/print/info/617_apptonly.html)
Deposit; Tom Liljenquist; 2012; (D066)
Purchased from: The Horse Soldier, Gettysburg, Pennsylvania, 2012.
Forms part of: Liljenquist Family Collection of Civil War Photographs (Library of Congress).
Forms part of: Ambrotype/Tintype photograph filing series (Library of Congress).
Subjects:
United States.--Army--People--1860-1870.
Soldiers--Union--1860-1870.
Military uniforms--Union--1860-1870.
United States--History--Civil War, 1861-1865--Military personnel--Union.
Format: Portrait photographs--1860-1870.
Tintypes--Hand-colored--1860-1870.
Rights Info: No known restrictions on publication.
Repository: Library of Congress, Prints and Photographs Division, Washington, D.C. 20540 USA, hdl.loc.gov/loc.pnp/pp.print
Part Of: Ambrotype/Tintype filing series (Library of Congress) (DLC) 2010650518
Liljenquist Family collection (Library of Congress) (DLC) 2010650519
More information about this collection is available at hdl.loc.gov/loc.pnp/pp.lilj
Higher resolution image is available (Persistent URL): hdl.loc.gov/loc.pnp/ppmsca.34271
Call Number: AMB/TIN no. 2995