Picked this up a few years ago--thought it might be of interest (it's definitely
off topic).
Was browsing an antique store that specialized in Civil War artifacts & memorabilia and saw this old knife--advertised as late 18th century, older than most of their other stuff. Picked it up & showed it to a buddy downstate who's had his own antique business for over 20 yrs.--he confirmed that it was old gentleman's dagger typical of the late colonial to early federalist period--a common sidearm for somebody in Washington's generation, more or less. I thought it was particularly cool that the sheath survived. Knife has dark horn
handle and brass pommel (which polished up pretty nicely).