50 Rupees Mauritius Commercial Bank, Unissued

The Mauritius Commercial Bank was established in 1838 — which makes a dated 1835 issue attributed to it an immediate problem. Pick S136 likely reflects either a misdating in the standard catalog or a pre-incorporation specimen produced in anticipation of the bank's formal licensing. This kind of advance printing was not unheard-of in the British colonial banking world, where London-based printers sometimes produced note stock before a charter was fully confirmed.

Unissued status here is almost certainly original, not accidental. Notes that never entered circulation tend to survive in far better condition than their issued counterparts, but their numismatic interest lies precisely in what stopped them — regulatory delay, charter revision, or a simple change in denomination policy before the series went out.