50 Rupees

Pick 84 spans an unusually long issue window — over two decades — during which the note passed through multiple signature varieties as successive RBI governors cycled through office. Collectors tracking the series by signature rather than date will find some combinations significantly scarcer than others, particularly the earlier issues from the late 1970s and early 1980s before printing infrastructure modernization under Nasik's Security Printing Press was fully consolidated.

The watermark was the note's primary security feature throughout its run, a notably modest specification for a denomination that remained in active everyday use well into the 1990s. Inset thread was introduced on later Indian issues, but this series never received it.