Thank you all for your input. Thanks Fred for supplying the page on Washington 3c 1870 design. So that does answer that the 169 is CBN and the 194 is ABN. Looking at the stamp, it is smoother and I noticed the shading on right underhalf of picttoral oval is is thicker as you can see between the first pic and second pic of the proofs from
http://www.1847usa.com/1870/BankNote03c.htm(first pic is CBN scott 158 and second is ABN scott 207). So that would make this stamp either 158 or 169 as CBN. Now I guess the question is what makes a stamp Mint with no gum?

Scott 158P4 - Continental Printing
Original Design - Proof on Card

Scott 207P4 - American Printing
Reengraved Design - Proof on Card
