Keith, S&W/RB used the Venetian Ripple pattern on production ware as well as the series of wares designed by Constance Spry. As far as I'm aware no piece of Constance Spry has been recorded in a colour - in other words
all have been clear/flint.
If anyone finds a coloured piece marked with the facsimile Constance Spry mark then this will of course change things
The amber vase looks very RB to me

Have you been able to compare it to any Webbs amber piece to help ID it?
Cheers, Nigel