In reply to Damo:
There used to be a site where you could download them for free, if you could spend the time poring over the grid to work out what you wanted, but it seems to be no longer up. I saved several but have since lost them.
I had been researching areas in India. The modern Olizane Swiss maps, that cover Ladakh and nearby areas, look very nice and are quite good, but have many serious errors in peak heights (and maybe other things?). The older Leomann Swiss maps are better than nothing but have whole patches almost blank, partly made-up, or just wrong.
So some years ago when I found a high, steep peak on Google Earth (whose resolution then was much poorer than now) in Eastern Kishtwar, it was only when I looked at an old Soviet map did I find that there was a huge mountain there around 6450m that did not show up on other maps. There were no photos of it around, though British climbers had been near it and, when prudent, returned to what 'became' Kishtwar Kailash (6451m).
http://www.planetmountain.com/english/News/shownews1.lasso?l=2&keyid=41...