I keep hearing about Clark crystals. Who is he and where are they Sold?

[Prsist]

Just bought a 1665 GW and will prob replace the crystal. I have read it will take a T-39. Will it take a flat tropic crystal? Do they even make such a beast, flat crystal for the 1665 GW?

[patinga]

Name is Gary, has a store on eBay:

nostalgia-2000