Small Electronics

4 objects in 2 subcategories, each ordered by the year production began. The longest-running is the Casio SL-300, made by Casio since 1957.

Calculators

2
Casio SL-300 1957 69 years Casio SL-300 Casio HP-12C 1981 45 years HP-12C Hewlett-Packard

Torches & Batteries

2
Maglite D-Cell Flashlight 1979 47 years Maglite D-Cell Flashlight Maglite Mini Maglite 1984 42 years Mini Maglite Mag Instrument 1985 also claimed