We have a double frame buckle recovered from a Civil War campsite.  It 
is stamped "1861" making me think that it was a sling buckle for a model 
1861 Springfield.  However, all the slings I have seen for the 
Springfield are single hole.  Some replica websites suggest our specimen 
might have gone to a carbine sling.  The only carbine I can find with an 
1861 model is the Burnside.  Has anyone come across this buckle and 
stamp or know if it is a Burnside Carbine type?  Archaeoseek users can 
find a picture here: http://archaeoseek.ning.com/photo/12774-3?context=user

Thanks for the help.
Chris
-- 
Christopher Sperling, MA
Archeologist/Historian
The Ottery Group