PETERBOROUGH, N.H. — A few days before Peterborough Auctions’ third sale, co-owners Molly Williams and Nick Prior were justifiably concerned about how the weather might affect their March 19 sale. Although without power for a few days, the sale went smoothly, and they sold a Rolex GMT Master II for $11,250. That particular model has two sets of hands and can simultaneously tell time in two different time zones. There was a large selection of paintings, prints and etchings. “Picknik on the Dunes,” an Impressionist style oil on canvas by Rockport, Mass., artist Charles Paul Gruppe (1860-1940) brought $3,625, leading the fine art category. The sale included several pieces of jewelry, sterling silver, a 1599 bible, cased ship models, furniture and more. Prices quoted include the buyer’s premium as reported by the auction house; a full report will feature in a forthcoming issue.