You are looking at 2 calling cards that I believe belonged to siblings MINNIE BLANCH BELL & WILLIAM PLUMMER BELL of BUTLER, WASHINGTON & BEAVER Counties, Pa.
NOTE: WILLIAM & MINNIE'S father was also named WILLIAM so it's difficult to tell if this was his or the sons.
Both calling cards are in nice shape but they have dirty spots (see scans).
I have done some research on these 2 cards and this is what I've found:
MINNIE BLANCH BELL & WILLIAM PLUMMER BELL were siblings and the children of WILLIAM ALLISON BELL & MARY OLIVE WILEY.
MINNIE B. BELL was born Dec. 1892, Butler Co., Pa., and it's uncertain when she died.
WILLIAM PLUMMER BELL was born March 23, 1894, BUTLER CO., PA. and he may have died Dec. 1961. WILLIAM was single in 1917 (WW1 records) but he was married by WWII records to CATHERINE E..
MORE ON WILLIAM ALLISON & MARY O WILEY BELL:
WILLIAM A. BELL was born June 1859 (1900 census) & MARY O. WILEY BELL was born JAN. 1856 (1900 census).
WILLIAM & MARY BELL had the following children:
ROBERT F. (1879), ADDA M. (1881), WILLA E. (1883), MERTIE A. (1883), JOHN H., (1886), LEVINA M. (1888), EMMA I. (1890), WILLIAM P. (1894), MINNIE B (1892), JAMES M. (1896), MERLE L. (1905) & MARY I. (1901).
NOTES ON MINNIE BELL: (card)
She was still living with her widowed father in 1930, I do not believe she married, however, I could not find her in the S.S. Index under MINNIE B. BELL and there were 13 MINNIE'S with the birth month & year December 1892 and none of those were in BEAVER, BUTLER or WASHINGTON COUNTIES.
In 1930, FREEDOM, BEAVER CO., PA., MINNIE'S occupation was PUBLIC SCHOOL TEACHER.
NOTES ON WILLIAM PLUMMER BELL (card)
WILLIAM P. BELL & wife CATHERINE E. were livng at 450-12th St., Freedom, Pa. in 1942.
I have no additional information on these families