Eastern RR. Boldly struck blue postmark (Towle 4-A-1, scarcity IV) on a folded letter sheet to Boston; matching grid ties an 1847 5¢ red brown (4 large margins except top right corner slightly clipped & margin nick at bottom right), Very Fine, a scarce early railroad usage. Scott No. 1  Estimate $300 - 400. $0 (Image)