Here's some good information on the five military issue types. While none mention being marked "India", it does say I believe in the MKIII section that those marked "Made in India" would be post India independence which would be 1949. WWII marks would be similar to bayonets, RFI, MWR, etc. So whether India would be still using the broad arrow after independence, I do no know.
I'm pretty sure mine is an MKII with no Britishmarkings.
1. The MK 1 (Pre-WW1) | Heritage Knives