Part 2 of 3 in Billings, Mont., features a 19th-century Japanese suit of armor; an 1874 oil painting by Swiss artist Luigi Rossi; and a circa 1825 Parisian gilt bronze serving tray that's valued at $50,000 to $70,000. Also: the work of furniture designer Thomas Molesworth (1890 to 1977), known for his rustic stylings, is discussed.