This bowl in the V&A appears to have been marked '
Keith Murray S W Brierley' with a fleur-de-lis, acid etched (Makers's mark)' i.e. no Royal mentioned.
However their description is remarkably confusing as it says it was designed in 1938-1939 but shown in 1935

- I think it's not possible it was shown before it was designed

so it's equally possible that where it says 'Marks' it could be incorrect.
'BRIEF DESCRIPTION
Glass Bowl, Britain (Brierley Hill), designed by Keith Murray, for Stevens & Williams Glassworks, 1938-1939'
and
'GALLERY LABEL
Shown in the exhibition 'Glass, Pottery and Silver designed by Mr Keith Murray, Medici Galleries, London, 1935'https://collections.vam.ac.uk/item/O6545/bowl-murray-keith/Bowl
1938-1939 (made)
ARTIST/MAKER
Murray, Keith (designer)
Stevens & Williams (manufacturer)
PLACE OF ORIGIN
Brierley Hill (made)
OBJECT DETAILS
CATEGORY
Glass
OBJECT TYPE
Bowl
MATERIALS AND TECHNIQUES
Glass
BRIEF DESCRIPTION
Glass Bowl, Britain (Brierley Hill), designed by Keith Murray, for Stevens & Williams Glassworks, 1938-1939
DIMENSIONS
Maximum width: 27.3cm
STYLE
20TH GB
MARKS AND INSCRIPTIONS
'Keith Murray S W Brierley' with a fleur-de-lis, acid etched (Makers's mark)
GALLERY LABEL
Shown in the exhibition 'Glass, Pottery and Silver designed by Mr Keith Murray, Medici Galleries, London, 1935
This one is marked the same it appears (dated c. 1934/35) and also doesn't mention the word Royal:
https://collections.vam.ac.uk/item/O6541/bowl-murray-keith/This one is just marked Keith Murray S&W with a fleur de lys - no mention of Brierley or Royal Brierley:
https://collections.vam.ac.uk/item/O6998/vase-murray-keith/The other two I've checked in the V& A also have no mention of Brierley or Royal Brierley in the marks and date to the 1930s.
