Robert Phillips (d. 1881) was one of the first English jewellers to make 'Archaeological Revival' jewellery. The firm initially traded as Phillips Brothers at 31 Cockspur Street, then moved to no. 23 in 1855. In 1869 they traded as Phillips Brothers & Son, until Alfred Phillips took over in 1884.
This design, together with a similar enamelled Tudor Rose brooch in the British Museum, probably derives from the same source as a bracelet seen by Mrs. Haveis in the Cockspur Street shop: 'a bracelet of enamel and gold, whose deliacte traceries, with the Tudor Rose and fleur-de-lis, are adapted from a fine frieze beneath the tomb of Henry VII in Westminster Abbey'.
Cf. H. Tait, The Art of The Jeweller Vol. I, British Museum Publications Ltd., 1984, no. 1008, p. 167
C. Gere, European and American Jewellery 1830-1914, W Heinemann Ltd, 1975, p. 214