US Air  1,2,4,5

USA

1:

• paper
• flat base
• thumbhole
• horizontal tab
• zigzag cut

2,4:

• paper
• flat base with special fold
  
• horizontal tab

          2: straight cut

          4: zigzag cut

• manufacturer on base:                   

5:

• paper
• flat base
• horizontal tab
• straight cut
  
• manufacturer on base: