99.99999% certain the flower in stave basket is a Paul Ysart.
From the general look of it, I think this example could be from the late 50s or the 60s. Had it been from his Harland years (70s) I would have expected to see a PY or an H cane, but even in those years, he did not include a signature cane in all items.
If it was made during Paul's time at Caithness Glass (63 to 70) it could have been one sold through their shop with a paper CG label originally attached.
With a longwave & shortwave UV lights you would able to tell which period it was made, but with only a longwave (black light), separating pre-Caithness and Caithness periods is not possible.
Not sure about the Crown weight. It has similarities to the style of Paul Ysart crowns but he did not make limited editions (of anything) and if the scratched details really do show "PH" I suppose it could be by Peter Holmes, but I don't know for sure.