GEC #57, #66, & #81 blade sizes?

[stevefrench]

hey guys, what are the sizes of the actual blades (main and/or secondary) on all these knives?

Or if anyone had a comparison picture of these that would be great!

 

[jkulysses]

I don't have an 81 Abilene but on paper it should be the same size as the Schrade 8OT so I just snapped a few quick pictures for you of a 66 Serp Jack, 57 Halfwhitt & a Schrade 8OT.