Antler/bone comb with iron rivets

Bone comb, length 17.5cm. Single sided, with humped back. Constructed as usual with two curving plates, round upper surfaces, bolted together and to inner plate by means of 9 rivets. Decorated with transverse pairs of grooves making panels: centre one with diagonal cross-hatching, next four with chevrons in upper part filled with ring-and-dot punch marks, ring-and-dot also down sides; transverse grooves at ends with diagonal grooves arranged herring-bone-wise. Groove along top and bottom and space outside filled with diagonal cross-hatching. Other side of comb similar but not quite identical: one panel of chevron work missing, spoiling pattern. Teeth cut from middle plate on one side only, after comb made up - saw cuts run across on top of cross-hatching. Along back plate cut off along line of back, except at ends where it projects diagonally up and out, and in centre where there appears to have been a projection. Slightly damaged, some teeth missing.