Indian .22 rimfire ammo boxes. They ae the same boxes as used for .303, just with a much smaller round. The brown wooden box I have, but mine was filled with 32-round boxes of .303 Mark VII Ball, Greenwood & Batley 1955, total 288 rounds: 9 boxes.
The ISA/!\&A one would assume would be the marking for the Ishapore plant, ammunition division. The K1 designation box is for the Kirkee plant, much better known for .303.
The funny roundel-sort-of-thing tells you what is in the big steel box: Government Explosives owned by the War Office, Class 6 explosive materials (smallarms ammo). You will find a similar marking on British ammo boxes as well.
There is a great amount of British influence in the Indian Army, much more than in ours, more's the pity. TRADITION is what keeps an army marching and fighting when they are outnumbered, short on ammo and the rations are three days behind: something our government never realised. I think we should have a law that ONLY a person who has served in the military for an extended period (and at a rank ABOVE Corporal!) should be considered qualified for the Defence Ministry portfolio. But that's just my idea.
These are very nice things to have around, especially considering the distance you would have to walk to get another!