In the world of “Fancy” serial numbers, a Binary Note features two randomly repeating digits. And a Repeater Note displays a number where the second four digits repeat the first four. Now, get both with this coveted Binary Repeater Note! Its serial number shows the second four digits matching the first four, using just two digits (example: 11181118 - serial numbers vary). Supplies are limited, so order now to get this intriguing conversation starter!