Hi
More information coming through from a collector. Year 1760 plus or minus 10 years. This type of shoe buckle was popular between 1720 to 1790. The Lion passant which is stamped very clearly indicates a standard of silver quality. Happy digging folks !
Mike.
The Lion denotes Sterling Silver & there is a Makers-Mark (2 initials), but these are hard to make out & without the Assayer's Mark & Date Letter it will be a challenge to track down. It's not unusual for Silver Smiths to dodge the tax by not having it assayed.