1975 PHILIPPINE ORTHOPEDIC ASSOCIATION
25th ANNIVERSARY

March 17

Lithographed by the Government Printing Office, Manila, 
in se-tenant block of 10, in sheets of 100 subjects (10 x 10) or 10 se-tenant blocks per sheet.
Printed on ordinary paper with cream gum. Issued perforation 12 1/2. 
Quantity: 45s -- 925,000 se-tenant block of 10.
 

Normal


Horizontal Perforation Shifted and Slanted

Illustrated stamps from later printing,  with central gutter
between horizontal pairs of se-tenant blocks of 10.