Boston, MA--Mrs. W.N. Sala(?), U.S.N. Stazione siluri, Newport, RI/3-C./04/1880

This attractive, uncommon cover(slightly-reduced envelope is quite clean and has little wear and tear outside of a small nick in its right side; back flap is more than 90% intact) was sent on April 10, 1880, from Boston(a superb CDS and fancy, "L" cancel), Massachusetts, to a Mrs. W. N. Hall(?).

eBay