What are these Paul Storr "nut dishes" worth?

Hoping someone can help me identify these four lovely sterling footed “nut dishes”. They look like they may be from silversmith Paul Storr.

Each of the four “nut dishes” are: WEIGHT: 94 grams; DIMENSIONS: Height: 2 inches; Length 3 ¾ inches; Width: 2 ½ inches

Each has the following marks (left to right): Crowned leopard’s head, date letter “N”, lion passant, and head of George III and maker’s mark of Paul Storr.

My three questions are:

  1. Can you confirm the silversmith (Paul Storr or someone else?)
  2. From the markings, can you provide some background/history?
  3. Any idea what the value may be for these four footed nut dishes?
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