This weight was very probably / most likely / almost definitely made by Paul Ysart.
However, if he had been shown this weight for identification, he would quite likely have ignored it as he did with another example he was shown many years ago. Ignoring items was his way of saying he did not make it.
I produced a 2-part article in 2003 for the Paperweight Collectors Circle covering weights just like this one as well as some with definite clues to a Paul Ysart origin, including examples with a garland of "Ysart canes" which could be matched to other Paul Ysart weights, There was also one with a Monart Glass label (assumes the label did not originate on another weight). and some of the Paul Ysart weights with matched canes had a Monart Glass label.
The one in the Selman auction from 2007 shows "swirling lines" which I guess are just reflections of the lighting. Also, it may be the lighting of the photo that shows a pale mottled ground. All the others I have seen with that type of ground have been the same as the one in this thread - a mottled "peachy" colour with "pale blue-grey" - depending on the angle of the light.
The bases of weights like the one here may be smooth ground to the centre, "cracked off" pontil scar or acid etched "Tomey Birmingham" (in upper case).