Mid Century Blue Face Vase

I'm SO lost, my eyes hurt from searching , so i had to ask...if anyone out there in this wonderful collectors weekly community can help me?
the signature at the bottom (see pic) looks like "J & L"? OR , the second one, looks like just a backwards "J"-
I'm confused, can someone help me identify?

measurements are: 5.5 Tall X 4.5 Wide at top opening.
Swirl colors of light and dark blue, swirl color is a Greyish clay-like color.
It almost looks as if it's PINCHED into a face design.

ANY help , or website to look at would help me..
I thank you!