Can’t read the marks, but the spoon is by the Whiting Manufacturing Company, originally of Massachusetts. From 1880, they produced flatware with a series of different ‘Berry’ designs, and this one was known as ‘Blueberry’ pattern. By this time they had transferred production to New York (692-694 Broadway at Fourth Street), the original factory having been destroyed in a fire.
Whiting did not introduce date marks on their pieces until 1905, so if it has no date symbol, it will be sometime between 1880 and 1904.
Nice spoon.
If it does have a date symbol, these were the marks used by Whiting from 1905 onwards:
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