Patent ID: 11971686
Assignee: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. Timepiece comprising a dial comprising a support member, a mother-of-pearl wafer having an obverse side and a reverse side and at least partially covering the support member, and at least one decorative element arranged on the reverse side of said mother-of-pearl wafer, said decorative element being arranged to be visible on the obverse side of the mother-of-pearl wafer when subjected to a stimulus and invisible on the obverse side of the mother-of-pearl wafer in the absence of said stimulus, said decorative element defining around it, at least a first empty area on the reverse side of the mother-of-pearl wafer, and at least a second empty area on the obverse side of the mother-of-pearl wafer, facing said first empty area, wherein said dial comprises at least one colour compensation layer deposited on at least one of the first empty area and second empty area, the colour of said colour compensation layer being selected such that the difference in colour ΔE in the CIE Lab colour space between the colour compensation layer and the decorative element in the absence of said stimulus, perceived by a user looking at the obverse side of the mother-of-pearl wafer, is less than 3, and wherein the surface of the compensation layer in contact with the support member is coplanar with the surface of the decorative element in contact with the support member,
wherein the decorative element is in direct contact with the mother of pearl wafer, and
wherein the decorative element is closer to the support member than is the mother of pearl wafer.