Any more information, Doug... what part of the county, age of other goodies dug, history...
Below is some information on various gunsights, but nothing yet that matches... <img src="/metal/html/shrug.gif" border=0 width=37 height=15 alt=":shrug">
WWII... B52
<img src="http://sbl.salk.edu/~dkaiser/Gunsight.jpg" alt="" />
WWII anti-aircraft sight (german but typical)
<img src="http://www.collectrussia.com/sBoot/Rboot.jpg" alt="" />
WWI anti-aircraft
<img src="http://www.hmascastlemaine.com/Photos/Oerlikon%20Cannon%20World%20War%202%20Weapon%202.jpg" alt="" />
WWI Vickers machine gun WWI
<img src="http://www.ima-usa.com/images/B138.gif" alt="" />
WWI Artillery Dial sight
<img src="http://members.tripod.com/~nigelef/72grule.gif" alt="" />
Tangent sight 19th century (from link below)
The tangent sight made the layer's job much easier because he could lay for both line and elevation simultaneously, but it was some time before it was generally accepted. Although invented c1779 few guns were fitted with it before 1800 owing to traditional opposition to new-fangled ideas. When offered the new sight, Nelson said he 'would not look at it' but felt the Royal Navy did not need sights because they always closed to within point blank range before opening fire....
...The tangent sight in the form shown survived as the principle method of laying field guns in the British Army (in both smooth-bore and rifled guns) until the South African War (1899 - 1902).
<img src="http://riv.co.nz/rnza/hist/gun/images/level3.jpg" alt="" />
Re-enactment Civil War
more info here:
http://members.tripod.com/~ProlificPains/arty.htm
<img src="http://www.55thvirginia.freeserve.co.uk/Cannon%20Fireing%203.jpg" alt="" />
Gunner's Quadrant 1600's
<img src="http://riv.co.nz/rnza/hist/gun/images/quad1.jpg" alt="" />
<img src="/metal/html/shrug.gif" border=0 width=37 height=15 alt=":shrug">