1877, folded letter franked with 1c lilac-purple & green, 4c ultramarine & brown, and 7c yellow & lilac, cancelled with black target cancels, postmarked St. Thomas (17 Sep), to St. Johns (San Juan), Puerto Rico, neatly-struck oval datestamp of St. Thomas forwarding agents J.F.D. Jurgens & Co, indistinct c.d.s. backstamp, light horizontal fold, a scarce and pleasing three-colour franking; with 1988 Nielsen certificate.
