Check against the official notice below — it lists the full affected range.
The U.S. Consumer Product Safety Commission warned consumers in December 1974 that approximately 300,000 sets of indoor-outdoor miniature Christmas lights sold over the previous two years pose a severe hazard of electric shock and fire. The Kresge Co. sold the lights under its own brand name in K-Mart, Kresge, and Jupiter stores for $2.00 to $5.00 per set in greenish-blue and white cartons labeled "35 or 50 Professional Decorator's Miniature Lites" with serial numbers 91-21, 91-23, 91-24, 91-25, 91-26, 91-27, 91-28, 91-40B, and 91-43 (the last for indoor use only). The Noma Manufacturing and Import Co. also sold similar lights under the "Noma Deluxe" brand labeled "35 or 50 Mini-Mini Lites" with numbers 3835, 3836, 3850, 3851, 3854, and 3856. The defect involves exposed metal contacts in the female end connector and loose or exposed bare wire connections.
Consumers who purchased these lights should stop using them immediately and carefully disconnect them from electrical outlets. The Kresge Co. stated it will refund the purchase price for its sets. Noma will repair and correct all sets returned at no cost to Noma, Forest Park, Illinois 60130.
Written by software from the official notice below. Not reviewed by a lawyer.
Electrocution/Electric Shock Fire & Fire-Related Burn
CPSC Issues Warning On Certain Christmas Lites NEWS from CPSC U.S. Consumer Product Safety Commission Office of Information and Public Affairs Washington, DC 20207 FOR IMMEDIATE RELEASE December 18, 1974 Release # 74-085 CPSC Issues Warning On Certain Christmas Lites Washington, D.C. (Dec. 18, 1974) -- The U.S. Consumer Product Safety Commission in cooperation with the S.S. Kresge Co. and Noma Manufacturing and Import Co. today warned consumers that approximately 300,000 sets of indoor-outdoor miniature Christmas lights sold nationwide over the past two years could present severe hazard of electric shock and fire. Exposed metal contacts in the female end connector and loose or exposed bare wire connections make the lights potentially hazardous. Kresge sold the lights under its own brand name in K-Mart, Kresge and Jupiter stores across the country for between $2.00 and $5.00. The label on the greenish blue and white carton reads: "35 or 50 Professional Decorator's Miniature Lites." Possibly defective sets have the following serial numbers on the front of the carton: 91-21; 91-23; 91-24; 91-25; 91-26: 91-27; 91-28; 91-40B and 91-43 (for indoor only.) The Noma brand lights, which were sold in small retail outlets across the nation, are called "Noma Deluxe" and also state "35 or 50 Mini-Mini Lites" on the front of the box. Possibly defective sets carry the following numbers on the box cover: 3835; 3836: 3850; 3851; 3854; 3856. These lights were designed to be used singly or in groups. Noma will correct and repair, at no cost, all sets returned to them -- Noma, Forest Park, Illinois 60130. Consumers who purchased these lights should cease using them immediately and carefully disconnect them from electrical outlets. The Kresge Co. has stated that it will refund the purchase price. The Commission was alerted to the hazard after a youngster in Chicago received a shock when he accidentally touched the lights. The Commission urges consumers to check all their Christmas lights for possible hazards.
Official record: U.S. Consumer Product Safety Commission ↗
Republished from the official source above; details can change — the source record controls.