Fine antique small folding packet knife. 
Gold filled handle.
1 blade.
Marked "usa" on blade. 
Circa early 20th century.
   Size:
About 2 5/8 in. (6.2 cm) long closed (not including the loop).   
About 4 5/8 in. (11.7 cm) long open.
  Condition: 
Very good original antique condition with very minor normal handling marks and charming indication of age. 
No problems with gold filled finish.
Unsharpened blade. 
Strong spring.
No repairs.