Russian Souvenir Sheets-Need Help

Just when I thought I was just about done with this pile, these remain. I've tried to determine the year (about the only thing I can read on these). I did try years before and after as well. On some I noted the year showing on the stamp but again I don't know if that is correct. Any help would be greatly appreciated. Thanks

OK. A partial solution. Top Left- Scott #B140; Third down (Seascape) #4042; Fourth down (Medal) #5249; Sixth down (Space) #3683. I have seen the 2nd one in the top row but I just can't resurrect it. Sorry...

This will have to be a team effort, as I can't take too much cataloging of USSR at one sitting. The third sheet, all by itself in the second scan, looks to be Sc# 4617, adoption of new constitution, from 1977. In 2008 it was $1.75 mint.

Thanks so much. That's a great start.

You're telling me CJD. I've been working on a stack of these stinkers for several weeks. I do a few at a time since I can't read any Russian, I have to go by the dates on them, pictures, any little think that might be on them. Then scan through the year looking for similar styled stamps etc. Gives me a headache. But I'm almost done...these were the last of my pile. Whew!! By the way, thanks for the help. Always appreciated.

Pat

The one on the right in the top row is Scott #5361 from 1985.

The one on the fifth row is Scott #4023 from 1972.

Another thanks!