With reference to pattern 341, Robert
Copeland's book, Spode & Copeland Marks and other Relevant Intelligence, p.117, states,
Very early
series recorded in un-named book, mostly neat border patterns on-glaze. 14-710 c1794 to 1800.
The date of this piece by pattern, shape and material is debatable amongst the experts ranging between 1780 to 1805. 1780-1790 by pattern number, 1794-1800 by description and pattern number (Copeland) and 1802 by it's shape up to 1805 by shape and porcelain composition.
Hence, I have conservatively listed this 341 SUCRIER as c1805 to accommodate the above assessments.