Help w/Identifying Watercolor Artist

hi everyone. i just got this little piece in a thrift store. the price was low and i think the painting is beautiful. i could see in the frame that it was signed just below what was visible. anyway, i removed it from the frame and this is what i found. i'm putting it up here in the hope that someone recognizes the mark. the date looks like 1970. the visible work in the frame measures 9.5 inches by 6 1/8 inches, so it is small. out of the frame it measures 10 1/8 inches by 6 3/4 inches. i should also mention the first image is a photograph and the second is a scan. neither of these is quite accurate in terms of the actual color. but they're both close in different ways. the blue of the actual painting is a really nice pale flat color. also, there is absolutely nothing in the way of clues to be gained from the backside of the frame. any help will be greatly appreciated...thanks

 

Where was the thrift store located?

Debora

 

CKL 1970? Beyond that, you've got me.

 

it's in Sacramento California

 

Do you think the subject is meant to be San Francisco?

Debora

 

I see CKR as the signature.

Debora

 

yes, that's where i was leaning. but i've found no one that's a likely candidate. CKL is also possible. i'll look at that when i get home...thanks