Hi Ray,
Looks probably ok for a Paul Ysart to me. Compare with my example (that I am now 99% confident was by Paul):
http://www.btinternet.com/~kevh.glass/pages/paul-ysart/unsigned/RareHarlequin.htmAlso, Colin Terris shows a triple Harlequin that Paul made as one of three during his Caithness years. Go to the page below, then select "Paul Ysart" and see the one top left in the page:
http://glassmaker.mysite.wanadoo-members.co.uk/Or for a slightly larger image, with description, select "Patience Rewarded" from the page:
http://ysartweights.mysite.wanadoo-members.co.uk/Each shows a structure with four outer "legs" around a central "column" and the upper "legs" positioned between the lower ones (probably for stability of the design).
At almost 4 inch diameter, it certainly is a large example - but I have seen a few Ysart weights that are even bigger, with the largest nearly 5 inch diameter. All would appear to be from the 1930s/40s period.
If you could send me an email (see my profile) with larger images attached I would be happy to consider it further.