India 10 rupees stumped

Can't find these any where. They both are corrected versions (Urdu inscription on bottom left).
The f84 Puntel sig. (P60)one is listed in both Numista and Krause as having no f prefix (listed as C and D prefixes) also picture on Numista has a B prefix.
The K64 R.N. Malhotra sig. (P60A) is listed in krause with no specific prefix.
Totally stumped...Help
A world without coins "Chaos"
0
Comments
Have you checked here ? - http://banknote.ws/COLLECTION/countries/ASI/IND/IND-RBI.htm
there was many notes similar but did not solve the mystery
A world without coins "Chaos"
I wrote a reply on Numista.

Just determine the Plate Letter **(series) which is a subtle under-print letter behind the serial # in the rectangular box.
Looks something like this:
for plate letter C ("Patel signature) showing that the note in question belongs to P-60f**
**https://sites.google.com/view/notaphilycculture/collecting-banknotes **
Thanks mystery solved
A world without coins "Chaos"