Trinidad SG128 1d imperf colour trial in Purple and Black on blue unwmkd wove

1901-06 1d imperforate colour trial in purple and black on blue unwmkd wove fine o.g. Produced in connexion with the 1901-03 new colours from Appendix B of Feb 26th 1900. (See The De La Rue Collection vol.6 p.6401). Original Purchased from Stanley Gibbons (Still on their card)