1922-23 O.H.E.M.S. 5m pink block of nine with central stamp showing overprint variety of two stops after "H" and no stop after "S," also 5m pink with double O.H.E.M.S. overprint (from the unique pane of 100), signed C.F. Hass, nearly all n.h., v.f. (Image)

Est.US$150

1922-23 O.H.E.M.S. 15m indigo block of six, with upper right stamp showing the overprint variety of two stops after "H" and no stop after "S," mostly n.h., v.f. and very scarce, signed C.F. Hass (Cat No. O29) (Image)

Est.US$150