Petoskey, (and CaOH),
Are you planning to join SSS? Send me an Email if you plan to join. My Email address is fsgrand2@fairpoint.net would like to hear from you about joining.
Your Spencer serial # is 16760 closest serial #s I found close to your #16760 are:
# 16789 - a Spencer Carbine issued to Company D, 5th New York Volunteer Cavalry on April 22, 1864;
# 16778 - a Spencer carbine issued to Company A, 18th Kansas Volunteer Cavalry in July 1867
# 16740 - a Spencer carbine issued to Company L, 2nd Michigan Volunteer Cavalry in 1864 (no day or month listed)
Really hard to determine which unit your Spencer was issued to . . . speculation is about all you can do with the above serial #s.
Two Flints