Greg,

Here are what I found on the security markings under the blue light.

1) the light yellow chip (which is the chip on top of the scan) has a "hat and cane" marking on the very top of the 1 dollar.

2) the medium yellow chip (which is the chip on the right of the scan) has a "hat and cane" on the 'body' of the 1 dollar.

3) the dark yellow (almost orange) chip (which is the chip on the left of the scan) has an UPSIDE DOWN "hat and cane" in the body of the 1 dollar.

Thank you for the help on the "blue light" and the security markings.