Thank you for the informationFor sure it's a flatware handle and most likely spoon rather than fork. I believe the last of the icons for the 'hallmarks' is a crown (can't distinguish the others), and the marks are this way up:
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They aren't British hallmarks and I think not actually hallmarks at all, but typical pseudo hallmarks of the kind often seen on American-made nickel-silver (a base-metal alloy with no silver content) which may or may not have been silver-plated.
The pattern is one of a myriad of variants of 'King's pattern' in 'hourglass' profile, but a rather crude low-workmanship version not likely to have come from any of the big makers. King's pattern was designed around 1789 by Henry & John Lias on commission to produce silverware as part of a service for George III to celebrate his return to health. By the 1800s, it was being widely copied (with countless variations by almost every maker) for sale to the general public. It became probably the most popular flatware design ever and is still produced today.
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I would think your handle is likely mid- to late-1800s.