Good find! Current catalogue valuation is $625 for Good, $1,250 for VG. This is a tough note and in demand. I don't think you would have a lot of trouble selling it for at least book value AS LONG AS YOU DON'T TRY TO "IMPROVE" IT in any way.
I'd be interested in the sheet number/check letter/sheet number colour (red or blue) for the register. Red sheet numbers aren't known (yet) on notes below Fine condition. The values I quoted are for blue. If yours has red numbers, add approximately 25% to the value.
Any chance of posting an image?