You are looking at an identified calling card owned by MISS MINNIE S. (probably SELLERS) CASSEL of LANCASTER, PA.
The calling card is in nice shape with a copyright date of 1880 (see scans).
I have done some research on this card and this is what I've found:
MINNIE S. CASSEL was born May 1, 1868, LANCASTER, PA. to JEREMIAH CASSEL & MARY A. SELLERS.
JEREMIAH CASSEL was born Oct. 9, 1842, LANCASTER & MARY A. SELLERS was born Mar. 16, 1850, LANCASTER.
MINNIE had siblings: CHARLES D. (1880-1940),
MINNIE CASSEL married MILTON L. SWARR on August 18, 1890.
MILTON L. SWARR was born March 31, 1868, E. Hempfield, Lancaster, Pa.
CHILDREN OF MINNIE & MILTON SWARR:
HARRY SWARR, born Jan. 10, 1896, E. HEMPFIELD, LAN., PA.
MINNIE CASSEL SWARR died December 4, 1949.
MILTON L. SWARR died August 1, 1945
MILTON L. SWARR'S parents were: MARTIN D. SWARR (1846-1895) and MARIA KREIDER LANDIS (1847-1904)
MORE ON HARRY CASSEL SWARR (MINNIE & MILTON'S SON)
OBIT: December 1977 - GOSPEL HERALD
Swarr.- Harry C., son of Milton and Minnie (Cassel) Swarr, was born Jan. 10, 1895; died of a heart attack at Landis Homes, Lititz, Pa., Nov. 10, 1977; aged 82 y. On Feb. 7, 1918, he was married to Kathryn Leamon, who died on Feb. 7, 1939. On Nov. 1, 1941, he was married to Katharine Hostetter, who survives. Also surviving are 2 sons (J. Mark and Paul L.), 6 grandchildren, and 4 great-grandchildren. He was a member of East Petersburg Mennonite Church. Memorial services were held at the Bethany Chapel of Landis Homes on Nov. 13, in charge of Irvin Kreider, Raymond Charles, John Shenk, and Melvin Lauver; interment in East Petersburg Cemetery.
HARRY CASSEL SWARR was first married to KATHRYN LEAMON, she died Feb. 1939. In Nov. 1941, HARRY married KATHARINE HOSTETTER.
HARRY CASSEL SWARR & KATHRYN LEAMON had 2 sons: JOHN MARK SWARR, born May 14, 1922 and PAUL L. (probably LEAMON) SWARR, born abt. 1928.
MORE ON HARRY C. & KATHRYN SWARR'S children:
JOHN MARK SWARR married ANNIE NOLT RISSLER.
ANNIE NOLT RISSLER was born AUG. 11, 1922, LANCASTER, PA., she died MAY 5, 2001, MT. JOY, LANCASTER CO., PA.
From some records I found online, PAUL L. SWARR married a MISS WENGER, that is all I could find on him.
MORE ON CHARLES D. CASSEL (MINNIE'S brother):
CHARLES was born May 21, 1880 and he died April 18, 1940 and he married three times.
First marriage: SADIE (1886-1904)
Second marriage: EMMA B. (1888-1921) - 7 children came out of this union: MARTHA (1910), MARY H. (1912), JEREMIAH H. (1914), DAVID H. (1915), ELIZABETH H. (1917), AMOS H. (1919) & EMMA H. (1921).
Interesting to note is that EMMA died in 1921 and baby EMMA was born in 1921 so she may have died in childbirth.
Third Marriage: SUSAN (1880-1959)
NOTE: Even though the card does not indicate a location, I am under the impression that this MINNIE S. CASSEL was from the LANCASTER, PA. area. I acquired a few other items that I was told came from the LANCASTER area so I began my search with the idea that she was from PA. All information listed above is based on that assumption.
I have no additional information on these families, however, I have other photos listed that may have a relationship to these families.