Hi Keith. The picture confirms what I believed would be the color transition in the vase. I am now pretty confident that the vase is darker variant of Rindksopf Pepita. I went through my picture archives and found a series of photos that confirmed my suspicion.
Vase R3 - I have an image of a vase with the same basic form as yours, (a little difference in the base form, but that is not uncommon) and with a distinctive surface pattern. It is also the same basic coloration but has no enamel work.
Vase R1 - I have an image of a R Pepita with the surface pattern of #3
Vase R2 - I have a picture of a R Pepita in the same form as yours with no surface pattern.
Your vase is the same shape as R2 and R3 and has similar coloration as R3 which has the Rindskopf surface pattern.
The images I have are from the internet so I can not post them here, but would be glad to send you the comparison photo I created with images and text which visually, makes the identification quite apparent. If you would like to see a copy, email me direct using the email icon to the left and I will respond with a copy of the image.
Craig