Not seeing the front I believe those are a 1974 issue P-37 note. MINIMUM value $1.25. THOSE look to be VF+ making them $2.00+ each.

Printed by Thomas De la Rue London LTD. Watermark: Shellfish Signed by T.B. Donaldson (if signed by W.C. Allen- Worth MUCH more)

Looks like you snagged a good buy!