Rory Gallagher’s Tortoiseshell (Celluloid) Picksaccess_time First seen circa 1985
While playing acoustic guitars Rory preferred to used tortoiseshell picks, as opposed to Herco Flex 75s that he used on electrics.
As using genuine tortoiseshell was banned in the early 70s, Rory of course, most likely referred to the standard celluloid picks, such as the one manufacturers like Fender still produce today – see Fender 351 Shape Classic Picks.
I use Herco grey picks, which are a hard, heavy nylon type. […] For acoustic I prefer a tortoiseshell for crispness.February 1985 issue of Guitarist