The first bow is 40 lbs. draw weight, i.e, 40#.
The second bow is 45 lbs. draw weight, i.e., 45#.
The third bow is also 45 lbs. draw weight, i.e., 45#.
The notation on the third bow of 45# e 28" actually probably treads 45# @ 28" which means that the bow draw weight is 45 lbs. at 28 inches draw.
Noting that the weight is at 28 inches is somewhat redundant because the standard draw length is 28 inches unless otherwise specified & it seldom is specified otherwise.
Therefore, you can reasonably infer that the draw weights for the other two bows are at 28 inches.
I'm not sure but I think that the old rule of thumb for draw weights at different draw lengths was plus or minus 2 lbs. for each inch so the 40 lb. bow would be 38 lbs. at 27 inches and 42 lbs. at 29 inches. I'm sure there are reasonable limits to those numbers but I don't know where the rule of thumb becomes unrealistic.
Congratulations on finding some cool old bows. My guess is that they probably aren't worth much unless you find a collector wants one but there are a lot of old bows laying around somebody's garage or in somebody's attic just gathering dust.