This is an antique, later 19th century to early 20th century, plated silver teaset which includes 3 graduated spouted pots with lids and a lidded sugar or waste jar. The lids have mold shaped top knops and the handles are pierced, or reticulated. 'Extra plate' is an indication that this is plated silver and not sterling silver. Silverplate does not have a precious metal meltdown value like sterling silver does. There may be a maker stamp to indicate the manufacturer. The estimate is for the set altogether and is based on actual recent past recorded auction sales of comparables. Retail 'asking prices' can be higher and vary.