6:

 Mark of the devil 1-6

 

1:

paper bag

flat base

manufacturer at bottom:

zig zag cut

2:

paper bag

flat base

thumbhole

manufacturer at bottom:

zig zag cut

 
1:

 3:

paper bag

flat base

thumbhole

horizontal tab

manufacturer at bottom:

straight cut

 

4:

glossy paper bag

flat base

thumbhole

zig zag cut

 

5:

glossy paper bag

flat base

zig zag cut

 

6:

paper bag

flat base

thumbhole

manufacturer at backside:

zig zag cut
3: