What would a Princess Diana plate in fine bone china from althorp limited to 1000 plate no 1 be worth?

A Princess Diana plate in fine bone china from Althorp, especially one limited to just 1,000 pieces and bearing the number 1, could be valued significantly due to its rarity and historical significance. Prices for similar collectible plates can range from a few hundred to several thousand dollars, with the number 1 plate often fetching a premium among collectors. Ultimately, the exact value would depend on its condition, provenance, and demand in the collectors' market. Consulting a reputable auction house or appraiser could provide a more accurate estimate.