Well, I did these last weekend. I was bored, I had the time, I had the patience to try watercolor again. Ok, I'm laying. I used watercolor pencil and a pentel aqua brush. But I used the pencils as though they were daubs of paint... running the brush over the tip of the pencil.
I will say, with the aqua brush, it lays down a ton of water, even when you don't want it to. So if you ever plan on buying one (they come in three sizes), make sure you practice before you work on your masterpiece.
Anyways, here's what I did and I know my 1970's is more 60's... I just say it's the very start of the 70's... yeah, that's it. Don't judge me.