Hi,
Am I missing something here?
I just checked the reference that you've given John, as I've often wondered who these were by, but the vase illustrated as HS 1329 is a different shape to the one that Frank has shown, even though there are strong similarities.
The shape shown in the book appears to have some moulding to the base, which then rises as a tumbler form with gradual everted rim. There is no bulging ridge at about the mid-point, and the loop handles are different; they do not reduce in size as they go down the vase, and there are only three loops.
I haven't gone through the rest of the Sandvik catalogues, so have you just quoted the wrong page?
Cheers, Nigel