The Creative Museum has two stunning mother-of-pearl combs. The first is a masterpiece of mother-of-pearl (mop) cutting and engraving. It depicts a roe deer, which symbolizes wealth and longevity. In Celtic culture, its antlers symbolize heavenly light.
They also have a drop-dead mop comb with a floral motif.
So I have been served. ;-) Here is my mop hair pin with a bird in a cherry tree. All these combs are English, c. 1850.