India To USA Cover Usage

Can anybody say why all the stamps on this cover, I picked this up at the Sunday meet in a dealers bargain box along with some Ceylon covers not something I normally would collect but they did shout out at me. Legit use? It does not appear philatelic being the application of the stamps,but then you never know.

I'm not sure of the rate (if my maths are correct Res2/0/6), but it was quite common in many parts of India to use up quantities of low values. This Jaipur cover for example:





By the time of this cover, the ¼ Anna stamp was redundant except as a make-up value; it had formerly paid the postcard rate. And another example of using up redundant ¼ Annas:



The Indian letter rate went up and down in the 1940s, but at one point, it certainly was 1½ Annas. It could well be that, at the time this letter was sent to the US, the 1½ Anna stamp was no longer useful.