
This is Br. India 1868 2A Vic. mauve special adhesive stamp (Barefoot 14) with perf. 14, printed on white wove paper with India globe watermark.
A special adhesive stamp by definition is a type of revenue stamp for use on plain paper mostly for notarization purpose, as an equivalent to Judicial or Non-Judicial Stamp Paper or for use on Hundi.
From 1879, special adhesives were authorized for payment of fees levied on commissions to practise as advocate, attorney or solicitors in the courts of Br. India.