Custom-made crystals for electronic equipment

• C-W CRYSTALS (formerly Phoenix Crystals), 1714 North Ash Street, Nevada, MO 64772, USA (00 1 417-667 6179, fax 00 1 417-667 6169, e-mail cwxtal@u-n-i.net . Supplying custom crystals for vintage equipment, amateurs and experimenters since 1933.
• GOLLEDGE ELECTRONICS, Merriott, TA16 5NS (01460-73718, fax 01460-76340).
• QUARTSLAB MARKETING Ltd (QSL Crystals), Box 19, Erith, DA8 1LH (01322-330830, fax 01322-334904