Try not to get confused by the prefixes on the serial number. It's more important that you discern the subtle
plate letter underneath the
Serial Number. It is barely noticeable & only seen in the underprint of the serial number box (see the 2 images below).
The image you posted of note on the left (with the stains/foxing) is very blurry so almost impossible to discern the plate letter below the serial number but it looks to be plate letter
F (with the Malhotra signature) which would make your note
P-60k. But look at your note again to be certain its not plate Letter G (& P-60l).
You can view another example of plate letter
F below:
(you can barely see the "F" imprinted below the first 6 in the 716604 serial #)
The image you posted on the right looks to be plate letter
C with the I.G. Patel signature, such as seen with this example below:
(you can barely see the "C" imprinted below the first 0 in the 602341 serial #)
That would make your note
P-60f
Hope that helps!
