spoon help.

[Garabaldi]

Looks silver and has the initials H.K. and on the back says "O.IBLEY" any ideas on how old it is or the name of the maker mark?

 

[Kenosha Kid]

O. E. Sibley ~ born 1805; died 1876.

http://freepages.genealogy.rootsweb.ancestry.com/~silversmiths/makers/silversmiths/119273.htm

Oscar Easterly Sibley worked in Canandaigua and Buffalo, NY from about 1835 - 1870; silversmith and dealer in watches.

http://www.worthpoint.com/worthopedia/prince-albert-1860-patt-coin-silver-serving

 

[Garabaldi]

Kenosha, you got it. One of your sites you posted it says "• He was a partner from 1846 to 1848 with Nathaniel W. Adams in Buffalo NY as SIBLEY & ADAMS, with a shop at 183 Main Street.
So I believe the spoon would date between 1846 to 1848.
Nice job.