Please look at this, The rear frame is not 741 as you can see the casting for the bolt on hanging transmission as used in Juniors and Princes. The Front Frame is not 741 as you can tell by the larger than 741 generator casting and the front and rear Shifter castings, 741 only has a rear. 741 never had skirted fenders, these are Junior Fenders or correctly called 30.50 in 1940.
I am by no means an Indian expert, but the front frame is 741, noted by straight (vertical) seat tube, and oval dash...rear frame does not have vertical suports in front of rear axle leading me to believe it was also 741, but upon further review, it may be a later vertical twin scout/Brit rear end adapted...the tranny jumps out at me as unusual, but since my wreck/project doesn't have a tranny I couldn't say for sure...Motor mounts, front pair mounted on rear...
The rear fender is strange to me... but I can't see enough of the front one to say any more. 30.50 is rght for the 741, I don't know enough about junior scouts to comment on similarities to 741.
There are many much wiser, experienced (better looking) Indian enthusiasts on this site that will be able to offer much more meaningful information than my Mr. Obvious observations. It is still a great find.