please ID date mark on spoon

[silveraussie]

I bought this spoon at a church fair about 3 months ago, my take on the hallmarks are - maker simon levy 1818/1828 - assay exeter - date letter 1820-1, this seems a little odd to me with 1818 inscribed under the monograms, am i correct with the marks or is there something fishy going on with this spoon ?.
thanks silveraussie

[silveraussie]

sorry about the pic just click on it & you'll see all the marks.

[Granmaa]

There's nothing wrong with the spoon. Sometimes engraved dates do differ from the date letter. Why? Your guess is as good as mine. Perhaps one spoon in a set went missing, and they replaced it with a new spoon.

Miles

[silveraussie]

thanks for that Miles