How to identify the 2nd and 3rd sets

In the blog post “1948-1958 first 3 sets difference”, it explains how to distinguish the 3 sets of banknotes, but also explains that the obverse of the second and third sets of banknotes is the same. It’s hard to tell them apart from the front. I also paid a lot of tuition fees for this reason, because the value of the second set of banknotes is much higher than that of the third set of banknotes. It wasn’t until one day when I organized my data and recorded to excel that I realized I might have found a way. I have recorded nearly 400 banknotes of the second set and 1,400 banknotes of the third set, which are arranged in an orderly number distribution. The serial numbers used in the second set seem to be consecutively used by the subsequent third set of banknotes. Now we can tell whether it is the second set or the third set of banknotes just by looking at the serial number on the front of the banknotes.

Face value	Set 2	Beginning to last serial number found	Set 3	Beginning to last serial number found
1	P.38	1A 049903 - 2X 006337	P.42	3D 477359 - 13Q 514588
5	P.39	1A 099903 - 1F 833900	P.43	1G 876378 - 3Q 491015
10	P.40	1A 099935 - 1T 360659	P.44	1V 030420 - 6C 848081
100	P.41	1A 005595 - 1A 789490	P.45	1A 806314 - 1G 287584

Precautions:

• There will be a gap between the end of the second set of banknotes and the beginning of the third set of banknotes, and the information is incomplete.
• Conclusions are purely subjective guesses.