Sc. #219 pair GREAT FALLS NH cover 1891 ***very nice***

Scott #219 pair of singles on fresh cream envelope with GREAT FALLS N.H. MAY 15 1891 cancel. Addressed to MILTON MILLS N.H. Receiving cancel and penciled calculation markings on the back. Enclosed business letter is shown. Nice, fresh item. I'm not a U.S. specialist, so I can't give more details. Sorry. Shipping is.70 to the USA and $2.20 to the rest of the world. Thanks for looking.