PHILADELPHIA, PA.- An array of 18th-century Britannia standard silver and one of the most extensive Georg Jensen flatware services to see the auction block in many years will headline Stephenson’s New Year’s Day Antiques & Decorative Arts sale. The suburban Philadelphia auctioneers specialize in estate antiques and art. Often, they are called upon to assess and auction the contents of grand residences on Philadelphia’s “Main Line.” That’s where the New Year’s silver trove was sourced – from the home of a prosperous family that owned a yarn goods company during the early to mid 20th century. The Jensen sterling flatware set consists of more than 200 pieces in the coveted Acorn pattern and includes numerous serving and accessory pieces, most notably an octet of emerald-enameled salts with individual spoons. The service has remained in the same family since 1941. “An estima