Cork-Grip:
  

Unbranded vintage rounded-triangle cork grip guitar pick/tortoise celluloid

(reverse of above)

Vintage teardrop cork grip guitar picks

(reverse of above-pick on left is circa 1940s)

2 very old cork grip picks. Left-'clover grip' & right-'crescent grip'.

(reverse of above picks)

Vintage 'half moon' cork grips.

(reverse of above)

Vintage white & green cork grips.

(reverse of above picks)

2 Vintage mosaic cork-grips(pick on the left is stamped 'Japan')

(reverse of above picks)

Vintage cork grip on right(pick on left 'feels' like genuine TS)

(reverse of above picks)

Vintage rounded tortoise shell celluloid 'crescent' grip

(reverse of pick shows where 'crescent' grip once lived)

Vintage cork grip on left(green, white & cream colored)

(reverse of above pick on left-missing cork grip)