thanks Mel - must be losing it if I didn't see that page, because I certainly did look on the Davidson site.
The shape of this item made me imagine it might have been older, but you're right about the use of ruby on post war domestic items - as opposed to its pre - war industrial use - must admit I'm not very bright when it comes to Davidson.
I've a couple of Davidson bowls also in ruby, plus a round 'ripple' vase (minus its stem support) - however, don't think they have quite the same translucent goldish/red look as Sowerby's 'rubine', although it might just be that the pressed pattern in the Sowerby bowls makes them disperse the light and sparkle better. Not sure if Sowerby also used selenium or something else, alhtough date wise they are a lot earlier than Davidson in production.
The bowl you speak of..........is it like the one in the pix I'm attaching...........amazing the extent that the left hand bowl is wonky, and the degree of red seems to vary.
Both of these carry the impressed 'W' or 'M' (on the underside) - and I seem to remember some short time after I joined the GMB there was endless talk of which letter it was supposed to be - don't know if the matter was ever resolved.
I do have a pressed stemmed eye bath in clear, on the base of which (in relief) there are the words 'MADE IN ENGLAND' - in the centre of which is a rectangular cartouche containing an upper case 'W' - at least it appears as that if you orient the other three words so that they can be read.
Whether this 'W' has any relationaship to the M or W on Davidson I've no idea, but wondered, often.