Maharaja Kerala Varma II succeeded in 1941, and died in 1943. You might expect such a short reign would be uneventful, or at least not as philatelically tumultuous as that of his brother. And you know, of course, you'd be wrong.
The first stamps bearing his portrait appeared in 1943, the year of his death. The ordinary stamps ranged from 2 Pies to 2¼ Annas (there was a 3 Anna, but this was only released with a Service overprint).
Some of the old single umbrella watermark paper was left over, and - frugally - it was used up, mainly to print the 2 Pies stamp, but also for literally a few sheets of the 4 Pies (£900 mint/£400 used) and 1 Anna (£100 mint/£130 used).
Many of the stamps also exist in both perf gauges, 11 and 13x13½, so you can see that this will be another marathon ...
Here is the second cheapest version of the 2 Pies, SG 86 (on sheet watermarked paper, perf 13x13½)

The 2 Pies is known, just, perf 11. If you have a lazy £2250, you can get the cheaper version on single umbrella paper; otherwise, you can go for the deluxe, sheet watermark version, at £3250. Both prices are for used - mint appear to be unknown. Is that the distant rumble of perf gauges I hear?
The 4 Pies is another sleeper. Gibbons rates the cheaper, perf 11, variety at £5.50. I think it's worth rather more. This is the only example I have:

SG 87a
The 9 Pies is only known perf 11, and is much easier

SG 89
The 1 Anna is another hard one. This cheaper perf 11 version, SG 90a, is still a £60 item. Beware of cleaned fiscal usages!

Finally, the top value, the 2¼ Anna on one of my favourite covers:

SG 91
What
was this lad sending registered to the Victory Stamp Stall? And why did he use his school, and not his home, return address? Could it be he didn't want his parents knowing where he was spending his pocket money?