1976 Social Pioneers, Set of 4 Benham Engraved FDC's, Vertical Gutter Pairs with Relevant cds & FDI postmarks

28th April 1976 Social Pioneers, Set of 4 Benham Engraved FDC's Vertical Gutter Pairs, superb set of 4 with Relevant cds & FDI postmarks. 8½p Thomas Hepburn stamp, Durham FDI. First Miners Union. 10p Robert Owen, Rochdale Lancs. FDI, The First Co-op was founded in Rochdale. 11p Lord Shaftesbury stamp, Shaftesbury Dorset cds, Child Labour Reform. 13p Elizabeth Fry stamp, Parkhurst Newport Isle of Wight cds, Prison Reform. Pristine condition, small labels.